Mozilla
Monthly
Incorrect boundary conditions in Firefox's JavaScript JIT compiler expose network-reachable memory corruption in all Firefox versions prior to 150.0.3, yielding partial confidentiality and integrity impact per CVSS C:L/I:L. The flaw is classified under CWE-119 (buffer bounds violation) and carries a CVSS 6.5 Medium score with an AV:N/AC:L/PR:N/UI:N vector - though the UI:N designation warrants scrutiny for a browser-based JIT flaw (see confidence notes). SSVC assesses technical impact as partial with no confirmed exploitation, and EPSS places exploitation probability at 0.03% (8th percentile), indicating low real-world exploitation pressure despite the network-reachable vector. No public exploit identified at time of analysis.
Zen Browser prior to version 1.19.12b incorrectly truncates long hostnames in the address bar, displaying only the attacker-controlled subdomain prefix while hiding the actual registrable domain (eTLD+1). This allows attackers to craft malicious URLs with extremely long subdomains that visually impersonate trusted brands, directly compromising the URL bar as a security indicator and enabling phishing and supply-chain attacks. The vulnerability requires user interaction (clicking a malicious link) but affects all users on vulnerable versions. No public exploit code or active exploitation has been identified at this time.
Zen Browser prior to 1.19.12b fails to validate item links within RSS/Atom feeds, allowing high-privileged users to inject malicious URLs that bypass feed URL restrictions and are opened as trusted tabs. An attacker with administrative or high privileges can craft a malicious RSS feed containing non-HTTP(S) links that are processed without validation and opened with elevated trust, potentially enabling script injection or protocol handler abuse.
Unauthenticated CRLF injection in AVideo's Scheduler plugin allows remote attackers to inject arbitrary calendar events into ICS files served from the victim's trusted domain, enabling high-credibility calendar phishing attacks. The vulnerable endpoint accepts attacker-controlled parameters without sanitization, passes them through an incomplete escape function that does not neutralize carriage-return/line-feed bytes, and constructs RFC 5545-compliant ICS calendar files containing injected VEVENT blocks. Exploitation requires only that the Scheduler plugin be enabled (common default) and user interaction to import the malicious .ics file; no authentication or special configuration is needed. A vendor-released patch is available.
Cache poisoning in @astrojs/node versions 9.4.4 and earlier allows unauthenticated remote attackers to poison CDN caches by sending malformed if-match headers to static asset endpoints, causing the server to return 500 errors with immutable one-year cache directives instead of the correct 412 Precondition Failed response. This vulnerability affects all subsequent requests to poisoned assets until the cache expires, breaking application functionality for legitimate users. The vulnerability is not actively exploited in the wild, but proof-of-concept exploitation is straightforward and requires only a single crafted HTTP request.
Integer overflow in Firefox's Audio/Video Playback component allows remote unauthenticated attackers to cause integrity violations through specially crafted multimedia content. The vulnerability stems from incorrect boundary condition handling in numeric calculations, potentially enabling attackers to modify playback state or corrupt audio/video streams without user interaction. Firefox 150 and later contain the fix.
Mozilla Firefox JavaScript Engine contains an improper input validation flaw that permits remote, unauthenticated information disclosure to attackers without user interaction. The vulnerability (CWE-20: Improper Input Validation) affects all versions prior to Firefox 150 and allows attackers to access sensitive data via a network-based attack with low complexity. A vendor-released patch is available in Firefox 150.
Denial of service via null pointer dereference in Firefox's Audio/Video Playback component allows remote attackers to crash the browser without user interaction. The vulnerability affects Firefox versions prior to 150 and requires only a network connection to trigger, resulting in availability loss but not code execution or data compromise. No active exploitation has been confirmed at time of analysis.
Denial of service in Firefox DNS networking component allows unauthenticated remote attackers to cause partial availability impact through crafted network requests. The vulnerability, classified as a cross-site request forgery (CSRF) issue within DNS handling, affects Firefox versions prior to 150 and has been patched by Mozilla.
Incorrect boundary conditions in Firefox's WebRTC component allow remote attackers to read limited memory contents without authentication. Firefox versions prior to 150 are affected by this low-confidentiality vulnerability, which CVSS rates at 5.3 due to network exploitability without user interaction, though CISA's SSVC framework indicates no current exploitation activity and limited technical impact.
Mitigation bypass in Firefox's DOM Security component allows authenticated remote attackers with user interaction to circumvent security controls and gain limited read/write access to sensitive data across security boundaries. Firefox 150 and later versions contain the fix; versions prior to 150 are vulnerable. SSVC assessment indicates no current public exploitation, though the vulnerability requires user interaction and authentication to trigger.
Information disclosure in Firefox's IndexedDB storage component allows remote unauthenticated attackers to leak sensitive data through a network-accessible vulnerability with no user interaction required. Affected versions include Firefox prior to 150 and Firefox ESR prior to 140.10. The vulnerability has a CVSS score of 6.5 reflecting moderate severity with confidentiality impact and limited availability risk.
Confidentiality compromise in Firefox NSS Libraries allows remote unauthenticated attackers to leak sensitive information over the network without user interaction. The vulnerability affects Firefox 150 and earlier, Firefox ESR 115.34 and earlier, and Firefox ESR 140.9 and earlier, and has been patched in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10. No public exploit code or active exploitation has been identified at the time of analysis.
Information disclosure via the Form Autofill component in Mozilla Firefox exposes private user data to unauthorized parties through a network-accessible vector requiring no privileges. All Firefox versions prior to 150 and Firefox ESR versions prior to 140.10 are affected. With an EPSS of 0.03% and SSVC exploitation status of none, real-world exploitation appears limited at this time, though the low-friction CVSS vector and widespread browser deployment make patching advisable.
Incorrect boundary conditions in Firefox's DOM Device Interfaces component allow remote attackers to cause limited data corruption and browser instability without authentication or user interaction, per CVSS vector AV:N/AC:L/PR:N/UI:N. Vendor-released patches are confirmed in Firefox 150 and Firefox ESR 140.10, with downstream Red Hat and SUSE advisories also issued. No public exploit has been identified at time of analysis, and EPSS at 0.04% (13th percentile) alongside SSVC exploitation status of 'none' indicate low real-world exploitation likelihood despite the moderate CVSS score.
Mitigation bypass in Mozilla Firefox's File Handling component allows remote network-reachable attackers to circumvent a security protection mechanism (CWE-693), resulting in partial confidentiality and integrity compromise. All Firefox stable versions prior to 150 and Firefox ESR versions prior to 140.10 are affected across platforms, with downstream impact confirmed for Red Hat Enterprise Linux and SUSE Linux packaging. No active exploitation has been confirmed - CISA KEV listing is absent, EPSS sits at 0.04% (12th percentile), and SSVC classifies exploitation status as none - making this a medium-priority patching item rather than an emergency response trigger.
DOM spoofing in Firefox allows remote attackers to deceive users about webpage origin and integrity through rendering manipulation, requiring user interaction. Affects Firefox 149 and earlier, Firefox ESR 115.34 and earlier, and Firefox ESR 140.9 and earlier. Fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10. EPSS score of 0.02% indicates low exploitation probability despite CVSS 6.3 rating, suggesting practical exploitation constraints despite network accessibility.
Invalid pointer handling in Firefox's JavaScript-WebAssembly component allows remote attackers to disclose information or cause limited memory corruption via a malicious webpage, requiring user interaction. The vulnerability affects Firefox versions prior to 150 and Firefox ESR prior to 140.10, with an EPSS score of 0.02% indicating minimal real-world exploitation probability despite moderate CVSS severity. Vendor-released patches are available in Firefox 150 and Firefox ESR 140.10.
A cross-site request forgery (CSRF) mitigation bypass in the DOM postMessage component of Firefox allows authenticated attackers to trigger denial of service against affected systems. The vulnerability bypasses existing CSRF protections through improper validation of postMessage origin checks, affecting Firefox versions prior to 150. No public exploit code has been identified, and exploitation requires authenticated network access without user interaction.
Double-free and use-after-free vulnerability in Mozilla's thin_vec Rust crate allows local attackers to read sensitive memory via panic-induced length corruption in IntoIter::drop and ThinVec::clear functions. The vulnerability occurs when a panic in ptr::drop_in_place fails to reset the vector length to zero, leaving dangling pointers accessible to subsequent operations. Affected applications linking thin_vec versions prior to the patched release face local information disclosure risk with low real-world exploitation probability (EPSS 0.02%).
A spoofing vulnerability exists in Mozilla Thunderbird that affects versions below 149 and below 140.9, allowing attackers to spoof email sources or identities. This vulnerability is classified as an information disclosure issue that could compromise email authentication and user trust. While specific CVSS and EPSS metrics are unavailable, the vulnerability warrants prompt patching as Mozilla has issued security advisories indicating active remediation efforts.
A spoofing vulnerability exists in Firefox's Privacy: Anti-Tracking component that allows attackers to deceive users or bypass security mechanisms through fraudulent representation. Firefox versions prior to 149 are affected. While specific exploit details are limited in available intelligence, the spoofing nature suggests attackers could impersonate legitimate content or services, potentially leading to credential theft, phishing success, or privacy compromise. No CVSS score, EPSS data, or confirmed KEV status is currently available, limiting real-time risk quantification.
Mozilla's Embed extension contains a domain allowlist bypass in the DomainFilteringAdapter due to insufficient hostname boundary validation in its regex pattern, allowing attacker-controlled domains like youtube.com.evil to pass validation checks for youtube.com. This vulnerability enables Server-Side Request Forgery attacks via the OscaroteroEmbedAdapter to probe internal services, and Cross-Site Scripting attacks through unsanitized oEmbed HTML responses returned by compromised domains. No patch is currently available for this medium-severity flaw.
Firefox's CSS parsing engine fails to properly enforce same-origin policy restrictions, allowing attackers to perform unauthorized modifications to web content across different origins through user interaction. Versions prior to 148.0.2 are affected, and the vulnerability requires user engagement to exploit. No patch is currently available, leaving vulnerable installations at risk of data integrity attacks.
Domain spoofing in Focus for iOS versions prior to 148.2 allows remote attackers to display malicious content under trusted domain names through navigation stalling and iframe redirection techniques, without requiring user interaction beyond the initial page load. An attacker can leverage this to conduct phishing attacks or distribute misleading content by presenting spoofed trusted domains in the browser UI. No patch is currently available for this vulnerability.
A use-after-free vulnerability in Firefox and Thunderbird's JavaScript WebAssembly engine allows remote attackers to achieve information disclosure or data manipulation through a malicious webpage or email attachment that requires user interaction. Affected versions include Firefox below 148 and Thunderbird below 148, with no patch currently available. The vulnerability has a network attack vector with low complexity and carries a CVSS score of 5.4.
Firefox and Thunderbird versions below 148 contain a race condition in the JavaScript garbage collection component that could allow an attacker to access or modify limited data through specially crafted content requiring user interaction. The vulnerability has a CVSS score of 4.2 and currently lacks an available patch.
Firefox for iOS before version 147.2.1 fails to properly synchronize the address bar with page content when malicious scripts interfere with new tab loading, enabling attackers to conduct HTML spoofing attacks under trusted domains. An attacker can exploit this through a malicious webpage to deceive users into believing they are viewing legitimate content from a trusted site. This vulnerability requires user interaction to trigger but has no patch currently available.
Thunderbird's inline OpenPGP message decryption can leak secret email contents through CSS style injection when remote content loading is enabled, allowing attackers to extract decrypted plaintext via crafted email formatting. This affects Thunderbird versions before 147.0.1 and 140.7.1, requiring user interaction to trigger the vulnerability. No patch is currently available.
Firefox's Anti-Tracking privacy protection can be bypassed by unauthenticated remote attackers through user interaction, potentially allowing tracking mechanisms to function despite enabled privacy protections. The vulnerability affects Firefox versions below 147.0.2 and currently has no available patch. An attacker could exploit this to circumvent Firefox's tracking prevention features and monitor user activity.
DOM spoofing in Mozilla Firefox and Thunderbird's copy, paste, and drag-and-drop functionality allows unauthenticated attackers to deceive users into performing unintended actions through crafted content. The vulnerability affects Firefox versions below 147 and ESR versions below 140.7, as well as Thunderbird versions below 147 and 140.7, requiring user interaction to exploit. No patch is currently available.
Firefox and Thunderbird versions before 147 contain an information disclosure vulnerability in their XML processing component that allows unauthenticated attackers to access sensitive data over the network with minimal attack complexity. The vulnerability requires no user interaction and affects the confidentiality of information without impacting system integrity or availability. No security patch is currently available.
The PDF Viewer component in Firefox and Thunderbird is vulnerable to clickjacking attacks that enable information disclosure through UI redressing techniques. Attackers can manipulate user interactions to trick victims into unintentionally revealing sensitive information, affecting Firefox versions below 147, Firefox ESR below 140.7, Thunderbird below 147, and Thunderbird ESR below 140.7. No patch is currently available for this vulnerability.
Improper boundary validation in the Graphics component of Firefox, Firefox ESR, and Thunderbird allows unauthenticated remote attackers to cause limited information disclosure over the network without user interaction. Affected versions include Firefox before 147, Firefox ESR before 115.32 and 140.7, and Thunderbird before 147 and 140.7. No patch is currently available for this medium-severity vulnerability.
Memory corruption in Firefox and Thunderbird's JavaScript garbage collection engine allows remote attackers to crash the application or potentially leak sensitive information without user interaction. The vulnerability affects Firefox versions below 147, Firefox ESR below 140.7, Thunderbird below 147, and Thunderbird ESR below 140.7, with no patch currently available.
The Networking component in Firefox and Thunderbird discloses sensitive information to unauthenticated remote attackers over the network. Affected versions include Firefox below 147, Firefox ESR below 140.7, Thunderbird below 147, and Thunderbird ESR below 140.7. No patch is currently available to remediate this vulnerability.
Memory corruption in Mozilla Firefox 146 enables remote code execution when users interact with malicious web content. Multiple memory safety bugs with exploitable potential affect Firefox 146 on all platforms. The vendor released Firefox 146.0.1 to address these issues. EPSS exploitation probability is low (0.06%, 18th percentile), and no public exploit identified at time of analysis, though Mozilla's security team assessed some bugs as likely exploitable with sufficient development effort.
Remote code execution in Mozilla Firefox via use-after-free in Disability Access APIs allows unauthenticated network attackers to compromise browser integrity with high impact. The vulnerability (CWE-416) affects Firefox versions prior to 146.0.1 and requires no user interaction or special privileges. With CVSS 9.8 (Critical) but low EPSS (0.07%, 21st percentile), real-world exploitation probability remains limited despite theoretical severity. No public exploit identified at time of analysis, and vendor-released patch 146.0.1 available.
Unicode right-to-left override (RTLO) characters in malicious websites can spoof filenames displayed in Firefox for iOS downloads UI, potentially tricking users into saving files with misleading extensions and types. Affects Firefox for iOS versions prior to 144.0; requires user interaction to download a file. The vulnerability has low real-world exploitation probability (EPSS 0.04%) despite the moderate CVSS score, as it relies on social engineering and user inattention rather than automatic code execution.
Multiple memory corruption flaws in Firefox and Thunderbird enable remote code execution via network-accessible attack vectors. Mozilla Firefox ESR 140.5, Firefox 145, Thunderbird ESR 140.5, and Thunderbird 145 contain memory safety bugs with evidence of corruption that Mozilla presumes exploitable for arbitrary code execution. Authentication requirements not confirmed from available data (CVSS vector shows PR:N). Vendor-released patches available: Firefox 146, Firefox ESR 140.6, Thunderbird 146, Thunderbird 140.6. EPSS probability is low (0.09%, 25th percentile), and no public exploit identified at time of analysis.
Memory corruption vulnerabilities in Mozilla Firefox 145 and Thunderbird 145 enable remote code execution via multiple memory safety bugs. Unauthenticated remote attackers can exploit these flaws (CWE-787 buffer overflow) through network-based attack vectors with low complexity, requiring no user interaction. Mozilla has released patches in Firefox 146 and Thunderbird 146. EPSS score of 0.07% (21st percentile) suggests low observed exploitation probability, and no public exploit identified at time of analysis, though the vendor's assessment indicates memory corruption with exploitable potential.
Same-origin policy bypass in Firefox and Thunderbird request handling allows unauthenticated remote attackers to access sensitive information from cross-origin resources with low attack complexity and no user interaction required. The vulnerability affects Firefox versions below 146, Firefox ESR below 115.31 and 140.6, Thunderbird below 146, and Thunderbird ESR below 140.6. No public exploit code has been identified at time of analysis, and the EPSS score of 0.04% indicates low real-world exploitation probability despite the moderate CVSS rating.
Just-In-Time (JIT) compilation flaws in Mozilla's JavaScript engine allow unauthenticated remote attackers to achieve arbitrary code execution with high integrity and availability impact across Firefox and Thunderbird. Affects Firefox <146, Firefox ESR <140.6, Thunderbird <146, and Thunderbird ESR <140.6. Despite a critical CVSS 9.8 score, EPSS probability remains low at 0.09% (25th percentile), and no public exploit or active exploitation (CISA KEV) has been identified at time of analysis. Vendor-released patches are available across all affected product lines.
Privilege escalation in Mozilla Firefox and Thunderbird Netmonitor component allows remote attackers to execute arbitrary code with elevated privileges when users interact with malicious content. Affects Firefox versions prior to 146, Firefox ESR prior to 140.6, Thunderbird prior to 146, and Thunderbird ESR prior to 140.6. Mozilla released patches in January 2025 across all product lines. EPSS score of 0.07% (22nd percentile) indicates low current exploitation probability, with no confirmed active exploitation (not in CISA KEV) and no public exploit code identified at time of analysis. CVSS 8.8 reflects the high impact potential despite requiring user interaction.
Privilege escalation in Mozilla Firefox and Thunderbird's Netmonitor component allows unauthenticated remote attackers to gain elevated privileges via user interaction. Affects Firefox <146, Firefox ESR <140.6, Thunderbird <146, and Thunderbird ESR <140.6. With an 8.8 CVSS score but only 0.07% EPSS (22nd percentile), no public exploit identified at time of analysis, and vendor-released patches available. Not listed in CISA KEV, indicating no confirmed active exploitation.
Downloads Panel in Mozilla Firefox and Thunderbird allows remote spoofing attacks enabling integrity compromise without authentication. Affects Firefox <146, Thunderbird <146, Firefox ESR <140.7, and Thunderbird ESR <140.7. The authentication bypass flaw (CWE-290) permits network-based attackers to manipulate download information displayed to users with low attack complexity and no user interaction required. Despite CVSS 7.5 (High), EPSS score of 0.02% (3rd percentile) indicates minimal real-world exploitation likelihood. No active exploitation confirmed (not in CISA KEV), and no public exploit identified at time of analysis.
Remote code execution in Mozilla Firefox and Thunderbird (pre-146) allows unauthenticated network attackers to execute arbitrary code via a use-after-free flaw in the GMP (Gecko Media Plugin) audio/video component. Despite a critical CVSS 9.8 rating, EPSS probability remains low (0.08%, 23rd percentile), and no public exploit identified at time of analysis. Mozilla patched both products in version 146, with vendor advisories and technical details available via Bugzilla.
JIT compiler miscompilation in Mozilla Firefox and Thunderbird's JavaScript engine enables remote attackers to achieve limited confidentiality, integrity, and availability impact without authentication or user interaction. Affects Firefox < 146, Firefox ESR < 140.6, Thunderbird < 146, and Thunderbird ESR < 140.6. Vendor-released patches available in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6. No public exploit identified at time of analysis, with EPSS score of 0.11% (30th percentile) indicating low predicted exploitation probability.
JIT compiler miscompilation in Mozilla's JavaScript engine allows remote code execution without authentication in Firefox (versions <146, <115.31 ESR, <140.6 ESR) and Thunderbird (versions <146, <140.6 ESR). The CVSS 9.8 critical score reflects network-based exploitation requiring no user interaction. EPSS score of 0.10% (27th percentile) suggests low predicted exploitation probability despite severity. No public exploit identified at time of analysis, and vendor-released patches are available across all affected product lines per Mozilla security advisories MFSA2025-92 through MFSA2025-96.
Privilege escalation in Mozilla Firefox and Thunderbird's DOM Notifications component enables unauthenticated remote attackers to achieve high-severity impacts (confidentiality, integrity, availability) via user interaction. Affects Firefox <146, Firefox ESR <115.31 and <140.6, Thunderbird <146 and <140.6. EPSS exploitation probability is low (0.08%, 23rd percentile), and no public exploit or active exploitation (CISA KEV) has been identified at time of analysis. Vendor-released patches are available across all affected product lines.
Sandbox escape in Mozilla Firefox and Thunderbird's CanvasWebGL component allows remote attackers to bypass security boundaries via crafted web content with user interaction. Affects Firefox <146, Firefox ESR <115.31 and <140.6, Thunderbird <146 and Thunderbird ESR <140.6. EPSS probability is low (0.06%, 20th percentile), and no public exploit identified at time of analysis. The CVSS score of 8.0 reflects high confidentiality and integrity impact with scope change, though attack complexity is high and requires user interaction.
Remote code execution via use-after-free in Mozilla Firefox and Thunderbird WebRTC signaling allows unauthenticated network attackers to execute arbitrary code without user interaction. Affects Firefox <146, Firefox ESR <140.6, Thunderbird <146, and Thunderbird ESR <140.6. Vendor-released patches available (Firefox 146, Firefox ESR 140.6, Thunderbird 146, Thunderbird 140.6). CVSS 9.8 (critical) reflects maximum technical severity, though EPSS 0.09% (25th percentile) and absence from CISA KEV suggest limited real-world exploitation at time of analysis. No public exploit identified at time of analysis.
Denial of service via CPU exhaustion in Mozilla Rhino versions prior to 1.7.14.1, 1.7.15.1, and 1.8.1. A remote attacker can pass a specially crafted small floating-point number to the toFixed() function, triggering excessive exponentiation in the pow5mult routine and consuming CPU resources. Exploit code is publicly available, though no active exploitation has been reported at this time.
Memory safety bugs present in Firefox 144 and Thunderbird 144. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect boundary conditions in the Graphics: WebGPU component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
JIT miscompilation in the JavaScript Engine: JIT component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect boundary conditions in the Graphics: WebGPU component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect boundary conditions in the Graphics: WebGPU component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Use-after-free in the WebRTC: Audio/Video component. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Same-origin policy bypass in the DOM: Workers component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Mitigation bypass in the DOM: Security component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Same-origin policy bypass in the DOM: Notifications component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect boundary conditions in the JavaScript: WebAssembly component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Spoofing issue in Firefox. Rated low severity (CVSS 3.4), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Use-after-free in the Audio/Video component. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Mitigation bypass in the DOM: Core & HTML component. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Race condition in the Graphics component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Use-after-free vulnerability in Mozilla Firefox 142 and 143 enables compromised renderer processes to trigger memory corruption in the GPU or browser process via malicious WebGPU IPC calls, potentially achieving sandbox escape. Affecting Firefox versions 142.0 through 144.0.1, this CWE-416 flaw carries CVSS 9.8 despite low real-world exploitation probability (EPSS 0.06%, 18th percentile). No public exploit identified at time of analysis. Patched in Firefox 144.0.2 released January 2025.
Remote code execution in Mozilla Firefox 143 and Thunderbird 143 allows unauthenticated network attackers to execute arbitrary code via memory corruption. The vulnerability stems from a memory safety bug (CWE-119 buffer overflow) exploitable without user interaction. CVSS score of 9.8 reflects critical severity with network-based attack vector, low complexity, and no privileges required. Vendor-released patches are available in Firefox 144 and Thunderbird 144. No public exploit identified at time of analysis, though Mozilla's assessment indicates the memory corruption is presumed exploitable with sufficient effort.
User interface spoofing in Firefox and Firefox Focus for Android's custom tab implementation allows remote attackers to misrepresent subdomain origins, enabling phishing attacks through crafted URLs. The custom tab feature truncates displayed hostnames to show only the parent domain, allowing malicious content on attacker-controlled subdomains (e.g., evil.example.com) to appear as legitimate sibling subdomains (e.g., legitimate.example.com). With CVSS 8.1 (High Confidentiality/Integrity impact) and no authentication required, this represents significant phishing risk for Android Firefox users. Patched in Firefox 144; no public exploit identified at time of analysis, though the UI flaw is straightforward to exploit.
Use-after-free memory corruption in Mozilla Thunderbird 143+ and Firefox allows remote code execution via malicious web extensions exploiting the native messaging API on Windows. CVSS 9.8 (critical) with network-based attack vector requiring no user interaction or authentication. Patched in Firefox 144 and Thunderbird 144. No public exploit identified at time of analysis, but CVSS metrics indicate high exploitability (AV:N/AC:L/PR:N/UI:N) with complete impact to confidentiality, integrity, and availability.
Firefox on Android allows remote attackers to display a fake address bar by exploiting the visibilitychange event when the legitimate address bar is hidden due to scrolling, enabling phishing attacks and user deception. The vulnerability affects Firefox versions prior to 144 and requires user interaction (clicking on the fake address bar). Mozilla released patched version Firefox 144 to address this issue, and there is no evidence of active exploitation at the time of analysis.
Firefox for Android leaks password-related screen content through the Android task switcher card carousel, exposing sensitive information to local attackers with physical or remote access to the device. Affects Firefox for Android versions prior to 144. No public exploit identified at time of analysis, but exploitation is trivial requiring only device access and standard OS features. CVSS 9.1 reflects the unauthenticated network attack vector, though real-world exploitation typically requires local device access, making the practical risk moderate for most threat models.
Sandboxed iframes in Firefox and Thunderbird can bypass Android permission restrictions to launch external applications without the required allow-permissions, enabling attackers to trigger unintended app launches through malicious links. Unauthenticated remote attackers can exploit this via user interaction (link click) to achieve integrity impact. Firefox 144 and Thunderbird 144 contain fixes; no public exploit code or active exploitation has been identified.
Memory corruption in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird ESR 140.3 enables remote arbitrary code execution when users interact with malicious content. Exploitation requires user interaction (opening crafted web content or email), but no authentication is needed. Mozilla issued patches in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird ESR 140.4. With CVSS 8.8 and EPSS data unavailable, the vulnerability represents critical risk to unpatched installations. No public exploit identified at time of analysis, though Mozilla's acknowledgment of memory corruption evidence suggests exploitation is technically feasible.
Memory corruption vulnerabilities in Mozilla Firefox and Thunderbird allow remote code execution when users interact with malicious web content. Affects Firefox ESR 115.28 and below, Firefox ESR 140.3 and below, Firefox 143 and below, Thunderbird 143 and below, and Thunderbird ESR 140.3 and below. Mozilla confirmed memory safety bugs with evidence of memory corruption presumed exploitable for arbitrary code execution. Vendor-released patches available: Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4. CVSS 8.8 severity driven by network attack vector with low complexity requiring only user interaction, no authentication required. No public exploit identified at time of analysis, though multiple internal bug reports suggest coordinated fix effort.
Command injection via Firefox/Thunderbird 'Copy as cURL' feature on Windows allows remote attackers to execute arbitrary commands when users copy network requests as cURL commands and paste them into terminals. Affects Firefox <144, Firefox ESR <140.4, Thunderbird <144, and Thunderbird <140.4 exclusively on Windows platforms. No public exploit identified at time of analysis, but attack vector requires only user interaction (CVSS PR:N/UI:R) with no privileges needed.
Firefox and Thunderbird allow cross-site scripting (XSS) attacks when a malicious page uses the type attribute of an OBJECT tag to override default browser behavior for resources served without a content-type header. An attacker can craft a malicious webpage that exploits this flaw to execute arbitrary JavaScript in the context of a vulnerable site that unsafely omits content-type headers, affecting Firefox versions before 144, Firefox ESR before 140.4, Thunderbird before 144, and Thunderbird ESR before 140.4. No public exploit code or active exploitation has been identified at time of analysis.
Modify read-only JavaScript Object properties in Firefox and Thunderbird via crafted web content, allowing attackers to bypass property immutability protections and alter application state. Affects Firefox versions below 144, Firefox ESR below 115.29 and 140.4, Thunderbird below 144 and 140.4. Requires user interaction (malicious website visit) but no authentication. CVSS 6.5 reflects high integrity impact with user-interaction requirement; no evidence of active exploitation or public exploit code at time of analysis.
Information disclosure in Mozilla Firefox and Thunderbird allows unauthenticated remote attackers to extract privileged browser process memory via malicious IPC messages from a compromised web content process. Affects Firefox <144, Firefox ESR <115.29 and <140.4, and Thunderbird <144 and <140.4. CVSS 9.8 indicates network-exploitable with no auth required, though actual exploitation requires first compromising a web content process. Vendor-released patches available (Firefox 144, Firefox ESR 115.29/140.4, Thunderbird 144/140.4). No public exploit identified at time of analysis; EPSS data not provided.
Out-of-bounds memory corruption in Mozilla Firefox and Thunderbird allows unauthenticated remote attackers to achieve code execution via malicious WebGL texture operations. A compromised web content process can exploit manipulated WebGL textures to trigger out-of-bounds reads and writes in privileged browser processes, potentially leading to full system compromise. Affects Firefox <144, Firefox ESR <115.29 and <140.4, and Thunderbird <144 and <140.4. Vendor-released patches available across all affected product lines. CVSS 9.8 reflects network-accessible, no-authentication-required attack with high impact across confidentiality, integrity, and availability. No public exploit identified at time of analysis, though the specific Bugzilla reference (1989127) indicates detailed technical analysis exists.
Remote code execution in Mozilla Firefox (all versions prior to 144, ESR prior to 140.4) and Thunderbird (all versions prior to 144, ESR prior to 140.4) allows unauthenticated remote attackers to execute arbitrary code, disclose sensitive information, or cause denial of service through a use-after-free vulnerability in MediaTrackGraphImpl::GetInstance(). With a critical CVSS score of 9.8 and no authentication required, this memory corruption flaw represents a severe security risk. No public exploit identified at time of analysis, though EPSS data not available to assess exploitation probability.
JIT miscompilation in the JavaScript Engine: JIT component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Sandbox escape due to integer overflow in the Graphics: Canvas2D component. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed. Rated medium severity (CVSS 4.0), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Information disclosure in the Networking: Cache component. Rated medium severity (CVSS 6.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Information disclosure, mitigation bypass in the Privacy component in Firefox for Android. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect boundary conditions in Firefox's JavaScript JIT compiler expose network-reachable memory corruption in all Firefox versions prior to 150.0.3, yielding partial confidentiality and integrity impact per CVSS C:L/I:L. The flaw is classified under CWE-119 (buffer bounds violation) and carries a CVSS 6.5 Medium score with an AV:N/AC:L/PR:N/UI:N vector - though the UI:N designation warrants scrutiny for a browser-based JIT flaw (see confidence notes). SSVC assesses technical impact as partial with no confirmed exploitation, and EPSS places exploitation probability at 0.03% (8th percentile), indicating low real-world exploitation pressure despite the network-reachable vector. No public exploit identified at time of analysis.
Zen Browser prior to version 1.19.12b incorrectly truncates long hostnames in the address bar, displaying only the attacker-controlled subdomain prefix while hiding the actual registrable domain (eTLD+1). This allows attackers to craft malicious URLs with extremely long subdomains that visually impersonate trusted brands, directly compromising the URL bar as a security indicator and enabling phishing and supply-chain attacks. The vulnerability requires user interaction (clicking a malicious link) but affects all users on vulnerable versions. No public exploit code or active exploitation has been identified at this time.
Zen Browser prior to 1.19.12b fails to validate item links within RSS/Atom feeds, allowing high-privileged users to inject malicious URLs that bypass feed URL restrictions and are opened as trusted tabs. An attacker with administrative or high privileges can craft a malicious RSS feed containing non-HTTP(S) links that are processed without validation and opened with elevated trust, potentially enabling script injection or protocol handler abuse.
Unauthenticated CRLF injection in AVideo's Scheduler plugin allows remote attackers to inject arbitrary calendar events into ICS files served from the victim's trusted domain, enabling high-credibility calendar phishing attacks. The vulnerable endpoint accepts attacker-controlled parameters without sanitization, passes them through an incomplete escape function that does not neutralize carriage-return/line-feed bytes, and constructs RFC 5545-compliant ICS calendar files containing injected VEVENT blocks. Exploitation requires only that the Scheduler plugin be enabled (common default) and user interaction to import the malicious .ics file; no authentication or special configuration is needed. A vendor-released patch is available.
Cache poisoning in @astrojs/node versions 9.4.4 and earlier allows unauthenticated remote attackers to poison CDN caches by sending malformed if-match headers to static asset endpoints, causing the server to return 500 errors with immutable one-year cache directives instead of the correct 412 Precondition Failed response. This vulnerability affects all subsequent requests to poisoned assets until the cache expires, breaking application functionality for legitimate users. The vulnerability is not actively exploited in the wild, but proof-of-concept exploitation is straightforward and requires only a single crafted HTTP request.
Integer overflow in Firefox's Audio/Video Playback component allows remote unauthenticated attackers to cause integrity violations through specially crafted multimedia content. The vulnerability stems from incorrect boundary condition handling in numeric calculations, potentially enabling attackers to modify playback state or corrupt audio/video streams without user interaction. Firefox 150 and later contain the fix.
Mozilla Firefox JavaScript Engine contains an improper input validation flaw that permits remote, unauthenticated information disclosure to attackers without user interaction. The vulnerability (CWE-20: Improper Input Validation) affects all versions prior to Firefox 150 and allows attackers to access sensitive data via a network-based attack with low complexity. A vendor-released patch is available in Firefox 150.
Denial of service via null pointer dereference in Firefox's Audio/Video Playback component allows remote attackers to crash the browser without user interaction. The vulnerability affects Firefox versions prior to 150 and requires only a network connection to trigger, resulting in availability loss but not code execution or data compromise. No active exploitation has been confirmed at time of analysis.
Denial of service in Firefox DNS networking component allows unauthenticated remote attackers to cause partial availability impact through crafted network requests. The vulnerability, classified as a cross-site request forgery (CSRF) issue within DNS handling, affects Firefox versions prior to 150 and has been patched by Mozilla.
Incorrect boundary conditions in Firefox's WebRTC component allow remote attackers to read limited memory contents without authentication. Firefox versions prior to 150 are affected by this low-confidentiality vulnerability, which CVSS rates at 5.3 due to network exploitability without user interaction, though CISA's SSVC framework indicates no current exploitation activity and limited technical impact.
Mitigation bypass in Firefox's DOM Security component allows authenticated remote attackers with user interaction to circumvent security controls and gain limited read/write access to sensitive data across security boundaries. Firefox 150 and later versions contain the fix; versions prior to 150 are vulnerable. SSVC assessment indicates no current public exploitation, though the vulnerability requires user interaction and authentication to trigger.
Information disclosure in Firefox's IndexedDB storage component allows remote unauthenticated attackers to leak sensitive data through a network-accessible vulnerability with no user interaction required. Affected versions include Firefox prior to 150 and Firefox ESR prior to 140.10. The vulnerability has a CVSS score of 6.5 reflecting moderate severity with confidentiality impact and limited availability risk.
Confidentiality compromise in Firefox NSS Libraries allows remote unauthenticated attackers to leak sensitive information over the network without user interaction. The vulnerability affects Firefox 150 and earlier, Firefox ESR 115.34 and earlier, and Firefox ESR 140.9 and earlier, and has been patched in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10. No public exploit code or active exploitation has been identified at the time of analysis.
Information disclosure via the Form Autofill component in Mozilla Firefox exposes private user data to unauthorized parties through a network-accessible vector requiring no privileges. All Firefox versions prior to 150 and Firefox ESR versions prior to 140.10 are affected. With an EPSS of 0.03% and SSVC exploitation status of none, real-world exploitation appears limited at this time, though the low-friction CVSS vector and widespread browser deployment make patching advisable.
Incorrect boundary conditions in Firefox's DOM Device Interfaces component allow remote attackers to cause limited data corruption and browser instability without authentication or user interaction, per CVSS vector AV:N/AC:L/PR:N/UI:N. Vendor-released patches are confirmed in Firefox 150 and Firefox ESR 140.10, with downstream Red Hat and SUSE advisories also issued. No public exploit has been identified at time of analysis, and EPSS at 0.04% (13th percentile) alongside SSVC exploitation status of 'none' indicate low real-world exploitation likelihood despite the moderate CVSS score.
Mitigation bypass in Mozilla Firefox's File Handling component allows remote network-reachable attackers to circumvent a security protection mechanism (CWE-693), resulting in partial confidentiality and integrity compromise. All Firefox stable versions prior to 150 and Firefox ESR versions prior to 140.10 are affected across platforms, with downstream impact confirmed for Red Hat Enterprise Linux and SUSE Linux packaging. No active exploitation has been confirmed - CISA KEV listing is absent, EPSS sits at 0.04% (12th percentile), and SSVC classifies exploitation status as none - making this a medium-priority patching item rather than an emergency response trigger.
DOM spoofing in Firefox allows remote attackers to deceive users about webpage origin and integrity through rendering manipulation, requiring user interaction. Affects Firefox 149 and earlier, Firefox ESR 115.34 and earlier, and Firefox ESR 140.9 and earlier. Fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10. EPSS score of 0.02% indicates low exploitation probability despite CVSS 6.3 rating, suggesting practical exploitation constraints despite network accessibility.
Invalid pointer handling in Firefox's JavaScript-WebAssembly component allows remote attackers to disclose information or cause limited memory corruption via a malicious webpage, requiring user interaction. The vulnerability affects Firefox versions prior to 150 and Firefox ESR prior to 140.10, with an EPSS score of 0.02% indicating minimal real-world exploitation probability despite moderate CVSS severity. Vendor-released patches are available in Firefox 150 and Firefox ESR 140.10.
A cross-site request forgery (CSRF) mitigation bypass in the DOM postMessage component of Firefox allows authenticated attackers to trigger denial of service against affected systems. The vulnerability bypasses existing CSRF protections through improper validation of postMessage origin checks, affecting Firefox versions prior to 150. No public exploit code has been identified, and exploitation requires authenticated network access without user interaction.
Double-free and use-after-free vulnerability in Mozilla's thin_vec Rust crate allows local attackers to read sensitive memory via panic-induced length corruption in IntoIter::drop and ThinVec::clear functions. The vulnerability occurs when a panic in ptr::drop_in_place fails to reset the vector length to zero, leaving dangling pointers accessible to subsequent operations. Affected applications linking thin_vec versions prior to the patched release face local information disclosure risk with low real-world exploitation probability (EPSS 0.02%).
A spoofing vulnerability exists in Mozilla Thunderbird that affects versions below 149 and below 140.9, allowing attackers to spoof email sources or identities. This vulnerability is classified as an information disclosure issue that could compromise email authentication and user trust. While specific CVSS and EPSS metrics are unavailable, the vulnerability warrants prompt patching as Mozilla has issued security advisories indicating active remediation efforts.
A spoofing vulnerability exists in Firefox's Privacy: Anti-Tracking component that allows attackers to deceive users or bypass security mechanisms through fraudulent representation. Firefox versions prior to 149 are affected. While specific exploit details are limited in available intelligence, the spoofing nature suggests attackers could impersonate legitimate content or services, potentially leading to credential theft, phishing success, or privacy compromise. No CVSS score, EPSS data, or confirmed KEV status is currently available, limiting real-time risk quantification.
Mozilla's Embed extension contains a domain allowlist bypass in the DomainFilteringAdapter due to insufficient hostname boundary validation in its regex pattern, allowing attacker-controlled domains like youtube.com.evil to pass validation checks for youtube.com. This vulnerability enables Server-Side Request Forgery attacks via the OscaroteroEmbedAdapter to probe internal services, and Cross-Site Scripting attacks through unsanitized oEmbed HTML responses returned by compromised domains. No patch is currently available for this medium-severity flaw.
Firefox's CSS parsing engine fails to properly enforce same-origin policy restrictions, allowing attackers to perform unauthorized modifications to web content across different origins through user interaction. Versions prior to 148.0.2 are affected, and the vulnerability requires user engagement to exploit. No patch is currently available, leaving vulnerable installations at risk of data integrity attacks.
Domain spoofing in Focus for iOS versions prior to 148.2 allows remote attackers to display malicious content under trusted domain names through navigation stalling and iframe redirection techniques, without requiring user interaction beyond the initial page load. An attacker can leverage this to conduct phishing attacks or distribute misleading content by presenting spoofed trusted domains in the browser UI. No patch is currently available for this vulnerability.
A use-after-free vulnerability in Firefox and Thunderbird's JavaScript WebAssembly engine allows remote attackers to achieve information disclosure or data manipulation through a malicious webpage or email attachment that requires user interaction. Affected versions include Firefox below 148 and Thunderbird below 148, with no patch currently available. The vulnerability has a network attack vector with low complexity and carries a CVSS score of 5.4.
Firefox and Thunderbird versions below 148 contain a race condition in the JavaScript garbage collection component that could allow an attacker to access or modify limited data through specially crafted content requiring user interaction. The vulnerability has a CVSS score of 4.2 and currently lacks an available patch.
Firefox for iOS before version 147.2.1 fails to properly synchronize the address bar with page content when malicious scripts interfere with new tab loading, enabling attackers to conduct HTML spoofing attacks under trusted domains. An attacker can exploit this through a malicious webpage to deceive users into believing they are viewing legitimate content from a trusted site. This vulnerability requires user interaction to trigger but has no patch currently available.
Thunderbird's inline OpenPGP message decryption can leak secret email contents through CSS style injection when remote content loading is enabled, allowing attackers to extract decrypted plaintext via crafted email formatting. This affects Thunderbird versions before 147.0.1 and 140.7.1, requiring user interaction to trigger the vulnerability. No patch is currently available.
Firefox's Anti-Tracking privacy protection can be bypassed by unauthenticated remote attackers through user interaction, potentially allowing tracking mechanisms to function despite enabled privacy protections. The vulnerability affects Firefox versions below 147.0.2 and currently has no available patch. An attacker could exploit this to circumvent Firefox's tracking prevention features and monitor user activity.
DOM spoofing in Mozilla Firefox and Thunderbird's copy, paste, and drag-and-drop functionality allows unauthenticated attackers to deceive users into performing unintended actions through crafted content. The vulnerability affects Firefox versions below 147 and ESR versions below 140.7, as well as Thunderbird versions below 147 and 140.7, requiring user interaction to exploit. No patch is currently available.
Firefox and Thunderbird versions before 147 contain an information disclosure vulnerability in their XML processing component that allows unauthenticated attackers to access sensitive data over the network with minimal attack complexity. The vulnerability requires no user interaction and affects the confidentiality of information without impacting system integrity or availability. No security patch is currently available.
The PDF Viewer component in Firefox and Thunderbird is vulnerable to clickjacking attacks that enable information disclosure through UI redressing techniques. Attackers can manipulate user interactions to trick victims into unintentionally revealing sensitive information, affecting Firefox versions below 147, Firefox ESR below 140.7, Thunderbird below 147, and Thunderbird ESR below 140.7. No patch is currently available for this vulnerability.
Improper boundary validation in the Graphics component of Firefox, Firefox ESR, and Thunderbird allows unauthenticated remote attackers to cause limited information disclosure over the network without user interaction. Affected versions include Firefox before 147, Firefox ESR before 115.32 and 140.7, and Thunderbird before 147 and 140.7. No patch is currently available for this medium-severity vulnerability.
Memory corruption in Firefox and Thunderbird's JavaScript garbage collection engine allows remote attackers to crash the application or potentially leak sensitive information without user interaction. The vulnerability affects Firefox versions below 147, Firefox ESR below 140.7, Thunderbird below 147, and Thunderbird ESR below 140.7, with no patch currently available.
The Networking component in Firefox and Thunderbird discloses sensitive information to unauthenticated remote attackers over the network. Affected versions include Firefox below 147, Firefox ESR below 140.7, Thunderbird below 147, and Thunderbird ESR below 140.7. No patch is currently available to remediate this vulnerability.
Memory corruption in Mozilla Firefox 146 enables remote code execution when users interact with malicious web content. Multiple memory safety bugs with exploitable potential affect Firefox 146 on all platforms. The vendor released Firefox 146.0.1 to address these issues. EPSS exploitation probability is low (0.06%, 18th percentile), and no public exploit identified at time of analysis, though Mozilla's security team assessed some bugs as likely exploitable with sufficient development effort.
Remote code execution in Mozilla Firefox via use-after-free in Disability Access APIs allows unauthenticated network attackers to compromise browser integrity with high impact. The vulnerability (CWE-416) affects Firefox versions prior to 146.0.1 and requires no user interaction or special privileges. With CVSS 9.8 (Critical) but low EPSS (0.07%, 21st percentile), real-world exploitation probability remains limited despite theoretical severity. No public exploit identified at time of analysis, and vendor-released patch 146.0.1 available.
Unicode right-to-left override (RTLO) characters in malicious websites can spoof filenames displayed in Firefox for iOS downloads UI, potentially tricking users into saving files with misleading extensions and types. Affects Firefox for iOS versions prior to 144.0; requires user interaction to download a file. The vulnerability has low real-world exploitation probability (EPSS 0.04%) despite the moderate CVSS score, as it relies on social engineering and user inattention rather than automatic code execution.
Multiple memory corruption flaws in Firefox and Thunderbird enable remote code execution via network-accessible attack vectors. Mozilla Firefox ESR 140.5, Firefox 145, Thunderbird ESR 140.5, and Thunderbird 145 contain memory safety bugs with evidence of corruption that Mozilla presumes exploitable for arbitrary code execution. Authentication requirements not confirmed from available data (CVSS vector shows PR:N). Vendor-released patches available: Firefox 146, Firefox ESR 140.6, Thunderbird 146, Thunderbird 140.6. EPSS probability is low (0.09%, 25th percentile), and no public exploit identified at time of analysis.
Memory corruption vulnerabilities in Mozilla Firefox 145 and Thunderbird 145 enable remote code execution via multiple memory safety bugs. Unauthenticated remote attackers can exploit these flaws (CWE-787 buffer overflow) through network-based attack vectors with low complexity, requiring no user interaction. Mozilla has released patches in Firefox 146 and Thunderbird 146. EPSS score of 0.07% (21st percentile) suggests low observed exploitation probability, and no public exploit identified at time of analysis, though the vendor's assessment indicates memory corruption with exploitable potential.
Same-origin policy bypass in Firefox and Thunderbird request handling allows unauthenticated remote attackers to access sensitive information from cross-origin resources with low attack complexity and no user interaction required. The vulnerability affects Firefox versions below 146, Firefox ESR below 115.31 and 140.6, Thunderbird below 146, and Thunderbird ESR below 140.6. No public exploit code has been identified at time of analysis, and the EPSS score of 0.04% indicates low real-world exploitation probability despite the moderate CVSS rating.
Just-In-Time (JIT) compilation flaws in Mozilla's JavaScript engine allow unauthenticated remote attackers to achieve arbitrary code execution with high integrity and availability impact across Firefox and Thunderbird. Affects Firefox <146, Firefox ESR <140.6, Thunderbird <146, and Thunderbird ESR <140.6. Despite a critical CVSS 9.8 score, EPSS probability remains low at 0.09% (25th percentile), and no public exploit or active exploitation (CISA KEV) has been identified at time of analysis. Vendor-released patches are available across all affected product lines.
Privilege escalation in Mozilla Firefox and Thunderbird Netmonitor component allows remote attackers to execute arbitrary code with elevated privileges when users interact with malicious content. Affects Firefox versions prior to 146, Firefox ESR prior to 140.6, Thunderbird prior to 146, and Thunderbird ESR prior to 140.6. Mozilla released patches in January 2025 across all product lines. EPSS score of 0.07% (22nd percentile) indicates low current exploitation probability, with no confirmed active exploitation (not in CISA KEV) and no public exploit code identified at time of analysis. CVSS 8.8 reflects the high impact potential despite requiring user interaction.
Privilege escalation in Mozilla Firefox and Thunderbird's Netmonitor component allows unauthenticated remote attackers to gain elevated privileges via user interaction. Affects Firefox <146, Firefox ESR <140.6, Thunderbird <146, and Thunderbird ESR <140.6. With an 8.8 CVSS score but only 0.07% EPSS (22nd percentile), no public exploit identified at time of analysis, and vendor-released patches available. Not listed in CISA KEV, indicating no confirmed active exploitation.
Downloads Panel in Mozilla Firefox and Thunderbird allows remote spoofing attacks enabling integrity compromise without authentication. Affects Firefox <146, Thunderbird <146, Firefox ESR <140.7, and Thunderbird ESR <140.7. The authentication bypass flaw (CWE-290) permits network-based attackers to manipulate download information displayed to users with low attack complexity and no user interaction required. Despite CVSS 7.5 (High), EPSS score of 0.02% (3rd percentile) indicates minimal real-world exploitation likelihood. No active exploitation confirmed (not in CISA KEV), and no public exploit identified at time of analysis.
Remote code execution in Mozilla Firefox and Thunderbird (pre-146) allows unauthenticated network attackers to execute arbitrary code via a use-after-free flaw in the GMP (Gecko Media Plugin) audio/video component. Despite a critical CVSS 9.8 rating, EPSS probability remains low (0.08%, 23rd percentile), and no public exploit identified at time of analysis. Mozilla patched both products in version 146, with vendor advisories and technical details available via Bugzilla.
JIT compiler miscompilation in Mozilla Firefox and Thunderbird's JavaScript engine enables remote attackers to achieve limited confidentiality, integrity, and availability impact without authentication or user interaction. Affects Firefox < 146, Firefox ESR < 140.6, Thunderbird < 146, and Thunderbird ESR < 140.6. Vendor-released patches available in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6. No public exploit identified at time of analysis, with EPSS score of 0.11% (30th percentile) indicating low predicted exploitation probability.
JIT compiler miscompilation in Mozilla's JavaScript engine allows remote code execution without authentication in Firefox (versions <146, <115.31 ESR, <140.6 ESR) and Thunderbird (versions <146, <140.6 ESR). The CVSS 9.8 critical score reflects network-based exploitation requiring no user interaction. EPSS score of 0.10% (27th percentile) suggests low predicted exploitation probability despite severity. No public exploit identified at time of analysis, and vendor-released patches are available across all affected product lines per Mozilla security advisories MFSA2025-92 through MFSA2025-96.
Privilege escalation in Mozilla Firefox and Thunderbird's DOM Notifications component enables unauthenticated remote attackers to achieve high-severity impacts (confidentiality, integrity, availability) via user interaction. Affects Firefox <146, Firefox ESR <115.31 and <140.6, Thunderbird <146 and <140.6. EPSS exploitation probability is low (0.08%, 23rd percentile), and no public exploit or active exploitation (CISA KEV) has been identified at time of analysis. Vendor-released patches are available across all affected product lines.
Sandbox escape in Mozilla Firefox and Thunderbird's CanvasWebGL component allows remote attackers to bypass security boundaries via crafted web content with user interaction. Affects Firefox <146, Firefox ESR <115.31 and <140.6, Thunderbird <146 and Thunderbird ESR <140.6. EPSS probability is low (0.06%, 20th percentile), and no public exploit identified at time of analysis. The CVSS score of 8.0 reflects high confidentiality and integrity impact with scope change, though attack complexity is high and requires user interaction.
Remote code execution via use-after-free in Mozilla Firefox and Thunderbird WebRTC signaling allows unauthenticated network attackers to execute arbitrary code without user interaction. Affects Firefox <146, Firefox ESR <140.6, Thunderbird <146, and Thunderbird ESR <140.6. Vendor-released patches available (Firefox 146, Firefox ESR 140.6, Thunderbird 146, Thunderbird 140.6). CVSS 9.8 (critical) reflects maximum technical severity, though EPSS 0.09% (25th percentile) and absence from CISA KEV suggest limited real-world exploitation at time of analysis. No public exploit identified at time of analysis.
Denial of service via CPU exhaustion in Mozilla Rhino versions prior to 1.7.14.1, 1.7.15.1, and 1.8.1. A remote attacker can pass a specially crafted small floating-point number to the toFixed() function, triggering excessive exponentiation in the pow5mult routine and consuming CPU resources. Exploit code is publicly available, though no active exploitation has been reported at this time.
Memory safety bugs present in Firefox 144 and Thunderbird 144. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect boundary conditions in the Graphics: WebGPU component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
JIT miscompilation in the JavaScript Engine: JIT component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect boundary conditions in the Graphics: WebGPU component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect boundary conditions in the Graphics: WebGPU component. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Use-after-free in the WebRTC: Audio/Video component. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Same-origin policy bypass in the DOM: Workers component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Mitigation bypass in the DOM: Security component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Same-origin policy bypass in the DOM: Notifications component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect boundary conditions in the JavaScript: WebAssembly component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Spoofing issue in Firefox. Rated low severity (CVSS 3.4), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Use-after-free in the Audio/Video component. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Mitigation bypass in the DOM: Core & HTML component. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Race condition in the Graphics component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Use-after-free vulnerability in Mozilla Firefox 142 and 143 enables compromised renderer processes to trigger memory corruption in the GPU or browser process via malicious WebGPU IPC calls, potentially achieving sandbox escape. Affecting Firefox versions 142.0 through 144.0.1, this CWE-416 flaw carries CVSS 9.8 despite low real-world exploitation probability (EPSS 0.06%, 18th percentile). No public exploit identified at time of analysis. Patched in Firefox 144.0.2 released January 2025.
Remote code execution in Mozilla Firefox 143 and Thunderbird 143 allows unauthenticated network attackers to execute arbitrary code via memory corruption. The vulnerability stems from a memory safety bug (CWE-119 buffer overflow) exploitable without user interaction. CVSS score of 9.8 reflects critical severity with network-based attack vector, low complexity, and no privileges required. Vendor-released patches are available in Firefox 144 and Thunderbird 144. No public exploit identified at time of analysis, though Mozilla's assessment indicates the memory corruption is presumed exploitable with sufficient effort.
User interface spoofing in Firefox and Firefox Focus for Android's custom tab implementation allows remote attackers to misrepresent subdomain origins, enabling phishing attacks through crafted URLs. The custom tab feature truncates displayed hostnames to show only the parent domain, allowing malicious content on attacker-controlled subdomains (e.g., evil.example.com) to appear as legitimate sibling subdomains (e.g., legitimate.example.com). With CVSS 8.1 (High Confidentiality/Integrity impact) and no authentication required, this represents significant phishing risk for Android Firefox users. Patched in Firefox 144; no public exploit identified at time of analysis, though the UI flaw is straightforward to exploit.
Use-after-free memory corruption in Mozilla Thunderbird 143+ and Firefox allows remote code execution via malicious web extensions exploiting the native messaging API on Windows. CVSS 9.8 (critical) with network-based attack vector requiring no user interaction or authentication. Patched in Firefox 144 and Thunderbird 144. No public exploit identified at time of analysis, but CVSS metrics indicate high exploitability (AV:N/AC:L/PR:N/UI:N) with complete impact to confidentiality, integrity, and availability.
Firefox on Android allows remote attackers to display a fake address bar by exploiting the visibilitychange event when the legitimate address bar is hidden due to scrolling, enabling phishing attacks and user deception. The vulnerability affects Firefox versions prior to 144 and requires user interaction (clicking on the fake address bar). Mozilla released patched version Firefox 144 to address this issue, and there is no evidence of active exploitation at the time of analysis.
Firefox for Android leaks password-related screen content through the Android task switcher card carousel, exposing sensitive information to local attackers with physical or remote access to the device. Affects Firefox for Android versions prior to 144. No public exploit identified at time of analysis, but exploitation is trivial requiring only device access and standard OS features. CVSS 9.1 reflects the unauthenticated network attack vector, though real-world exploitation typically requires local device access, making the practical risk moderate for most threat models.
Sandboxed iframes in Firefox and Thunderbird can bypass Android permission restrictions to launch external applications without the required allow-permissions, enabling attackers to trigger unintended app launches through malicious links. Unauthenticated remote attackers can exploit this via user interaction (link click) to achieve integrity impact. Firefox 144 and Thunderbird 144 contain fixes; no public exploit code or active exploitation has been identified.
Memory corruption in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird ESR 140.3 enables remote arbitrary code execution when users interact with malicious content. Exploitation requires user interaction (opening crafted web content or email), but no authentication is needed. Mozilla issued patches in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird ESR 140.4. With CVSS 8.8 and EPSS data unavailable, the vulnerability represents critical risk to unpatched installations. No public exploit identified at time of analysis, though Mozilla's acknowledgment of memory corruption evidence suggests exploitation is technically feasible.
Memory corruption vulnerabilities in Mozilla Firefox and Thunderbird allow remote code execution when users interact with malicious web content. Affects Firefox ESR 115.28 and below, Firefox ESR 140.3 and below, Firefox 143 and below, Thunderbird 143 and below, and Thunderbird ESR 140.3 and below. Mozilla confirmed memory safety bugs with evidence of memory corruption presumed exploitable for arbitrary code execution. Vendor-released patches available: Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4. CVSS 8.8 severity driven by network attack vector with low complexity requiring only user interaction, no authentication required. No public exploit identified at time of analysis, though multiple internal bug reports suggest coordinated fix effort.
Command injection via Firefox/Thunderbird 'Copy as cURL' feature on Windows allows remote attackers to execute arbitrary commands when users copy network requests as cURL commands and paste them into terminals. Affects Firefox <144, Firefox ESR <140.4, Thunderbird <144, and Thunderbird <140.4 exclusively on Windows platforms. No public exploit identified at time of analysis, but attack vector requires only user interaction (CVSS PR:N/UI:R) with no privileges needed.
Firefox and Thunderbird allow cross-site scripting (XSS) attacks when a malicious page uses the type attribute of an OBJECT tag to override default browser behavior for resources served without a content-type header. An attacker can craft a malicious webpage that exploits this flaw to execute arbitrary JavaScript in the context of a vulnerable site that unsafely omits content-type headers, affecting Firefox versions before 144, Firefox ESR before 140.4, Thunderbird before 144, and Thunderbird ESR before 140.4. No public exploit code or active exploitation has been identified at time of analysis.
Modify read-only JavaScript Object properties in Firefox and Thunderbird via crafted web content, allowing attackers to bypass property immutability protections and alter application state. Affects Firefox versions below 144, Firefox ESR below 115.29 and 140.4, Thunderbird below 144 and 140.4. Requires user interaction (malicious website visit) but no authentication. CVSS 6.5 reflects high integrity impact with user-interaction requirement; no evidence of active exploitation or public exploit code at time of analysis.
Information disclosure in Mozilla Firefox and Thunderbird allows unauthenticated remote attackers to extract privileged browser process memory via malicious IPC messages from a compromised web content process. Affects Firefox <144, Firefox ESR <115.29 and <140.4, and Thunderbird <144 and <140.4. CVSS 9.8 indicates network-exploitable with no auth required, though actual exploitation requires first compromising a web content process. Vendor-released patches available (Firefox 144, Firefox ESR 115.29/140.4, Thunderbird 144/140.4). No public exploit identified at time of analysis; EPSS data not provided.
Out-of-bounds memory corruption in Mozilla Firefox and Thunderbird allows unauthenticated remote attackers to achieve code execution via malicious WebGL texture operations. A compromised web content process can exploit manipulated WebGL textures to trigger out-of-bounds reads and writes in privileged browser processes, potentially leading to full system compromise. Affects Firefox <144, Firefox ESR <115.29 and <140.4, and Thunderbird <144 and <140.4. Vendor-released patches available across all affected product lines. CVSS 9.8 reflects network-accessible, no-authentication-required attack with high impact across confidentiality, integrity, and availability. No public exploit identified at time of analysis, though the specific Bugzilla reference (1989127) indicates detailed technical analysis exists.
Remote code execution in Mozilla Firefox (all versions prior to 144, ESR prior to 140.4) and Thunderbird (all versions prior to 144, ESR prior to 140.4) allows unauthenticated remote attackers to execute arbitrary code, disclose sensitive information, or cause denial of service through a use-after-free vulnerability in MediaTrackGraphImpl::GetInstance(). With a critical CVSS score of 9.8 and no authentication required, this memory corruption flaw represents a severe security risk. No public exploit identified at time of analysis, though EPSS data not available to assess exploitation probability.
JIT miscompilation in the JavaScript Engine: JIT component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Sandbox escape due to integer overflow in the Graphics: Canvas2D component. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed. Rated medium severity (CVSS 4.0), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Information disclosure in the Networking: Cache component. Rated medium severity (CVSS 6.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Information disclosure, mitigation bypass in the Privacy component in Firefox for Android. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.