Firefox For Ios
Monthly
Repeated external URL scheme invocations from a malicious webpage can flood Firefox for iOS with system confirmation prompts or trigger cascading external application launches, rendering the browser temporarily unusable. All Firefox for iOS versions prior to 155.1 on Apple iOS devices are affected. No active exploitation has been identified; Mozilla released the fix in Firefox for iOS 155.1, and exploitation requires the user to visit the attacker-controlled page.
Address bar spoofing in Firefox for iOS lets a malicious webpage stall a popup's cross-origin navigation after the browser internally commits it, causing the address bar to display the intended destination's origin while the popup continues rendering attacker-controlled content. All Firefox for iOS releases prior to 155.0 are affected; the fix shipped in version 155.0 per Mozilla advisory MFSA2026-81. No public exploit has been identified and CISA SSVC confirms exploitation status as none, but the phishing potential is realistic given the deceptive UI state.
PDF save functionality in Firefox for iOS allows maliciously crafted page titles to manipulate the output file path, enabling overwrites of existing PDF files or bundled application content within the Firefox iOS sandbox. All versions prior to 152.4 on Apple iOS devices are affected. An attacker operating a malicious website can lure a user into saving a page as PDF, causing the crafted title to resolve to an unintended file path within the app sandbox - potentially corrupting application state or stored documents. No public exploit has been identified at time of analysis, though SSVC classifies the vulnerability as automatable with partial technical impact.
Cookie injection in Firefox for iOS (all versions prior to 152.0) arises from the browser's TemporaryDocument PDF handling mechanism incorrectly preserving cookies from an initial PDF request across cross-origin HTTP redirects. This violates same-origin cookie isolation, enabling a malicious site to inject arbitrary cookies into requests directed at an unrelated target domain and potentially manipulate session or authentication state on that domain. No public exploit code has been identified and no CISA KEV listing exists; the CVSS vector (AV:N/AC:L/PR:N/UI:R) indicates low-complexity remote exploitability contingent on user interaction, and Mozilla has shipped a vendor-released patch in Firefox for iOS 152.0.
Cookie leakage in Firefox for iOS prior to 152.0 allows an attacker-controlled suffix domain to intercept cookies intended for a target site during PDF request handling. The browser's PDF loading code path applied partial rather than exact-origin domain matching when deciding which cookies to attach, meaning a domain such as 'evilbank.com' could satisfy a suffix match against 'bank.com' and receive that site's cookies. No active exploitation is confirmed, but the SSVC framework rates this as automatable with partial technical impact, making it a credible session-hijacking vector for users on unpatched versions.
Cross-site scripting in Firefox for iOS Reader View allows unauthenticated remote attackers to inject arbitrary markup via maliciously crafted JSON-LD metadata on attacker-controlled pages. When a victim activates Reader View on such a page, injected HTML executes in the context of an internal Firefox origin, leaking sensitive URL parameters that can be leveraged to access internal pages and achieve arbitrary JavaScript execution with elevated browser-origin trust. Mozilla patched this in Firefox for iOS 151.2 per MFSA2026-53; no public exploit code and no CISA KEV listing have been identified at time of analysis.
Reader View in Firefox for iOS executes arbitrary JavaScript due to an incorrect template substitution order, enabling cross-site scripting via JSON-LD data injection. The flaw affects all Firefox for iOS versions prior to 151.2 running on Apple iOS devices; unauthenticated remote attackers can exploit this by luring users to a malicious page and having them activate Reader View, after which attacker-controlled placeholder strings embedded in the page's structured data are processed as executable script. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, but the low attack complexity and no-auth-required access vector (per CVSS PR:N) make it feasible for opportunistic campaigns targeting iOS Firefox users.
Firefox for iOS misrepresents attacker-controlled domains as trusted origins through improper rendering of right-to-left Unicode characters and internationalized domain names (IDNs) in the link preview UI surface, enabling a spoofing/phishing attack against users on any iOS version prior to 151.1. The CVSS vector (PR:N/UI:R) indicates unauthenticated network-reachable exploitation contingent on user interaction with a crafted link. EPSS at the 5th percentile and SSVC exploitation status of 'none' confirm no active exploitation or public exploit code has been identified at time of analysis, positioning this as a targeted phishing risk rather than a broad automated threat.
Firefox for iOS Reader mode exposed an unauthenticated local HTTP server on the device, enabling a co-installed malicious application to request arbitrary URLs through that server and receive responses rendered with the authenticated user's session cookies. Affected versions are all Firefox for iOS releases prior to 151.0, confirmed by Mozilla Security Advisory MFSA2026-49. No public exploit code has been identified and CISA SSVC rates exploitation as none at time of analysis, but successful exploitation would allow silent exfiltration of authenticated web content from the victim's active browsing session.
Repeated external URL scheme invocations from a malicious webpage can flood Firefox for iOS with system confirmation prompts or trigger cascading external application launches, rendering the browser temporarily unusable. All Firefox for iOS versions prior to 155.1 on Apple iOS devices are affected. No active exploitation has been identified; Mozilla released the fix in Firefox for iOS 155.1, and exploitation requires the user to visit the attacker-controlled page.
Address bar spoofing in Firefox for iOS lets a malicious webpage stall a popup's cross-origin navigation after the browser internally commits it, causing the address bar to display the intended destination's origin while the popup continues rendering attacker-controlled content. All Firefox for iOS releases prior to 155.0 are affected; the fix shipped in version 155.0 per Mozilla advisory MFSA2026-81. No public exploit has been identified and CISA SSVC confirms exploitation status as none, but the phishing potential is realistic given the deceptive UI state.
PDF save functionality in Firefox for iOS allows maliciously crafted page titles to manipulate the output file path, enabling overwrites of existing PDF files or bundled application content within the Firefox iOS sandbox. All versions prior to 152.4 on Apple iOS devices are affected. An attacker operating a malicious website can lure a user into saving a page as PDF, causing the crafted title to resolve to an unintended file path within the app sandbox - potentially corrupting application state or stored documents. No public exploit has been identified at time of analysis, though SSVC classifies the vulnerability as automatable with partial technical impact.
Cookie injection in Firefox for iOS (all versions prior to 152.0) arises from the browser's TemporaryDocument PDF handling mechanism incorrectly preserving cookies from an initial PDF request across cross-origin HTTP redirects. This violates same-origin cookie isolation, enabling a malicious site to inject arbitrary cookies into requests directed at an unrelated target domain and potentially manipulate session or authentication state on that domain. No public exploit code has been identified and no CISA KEV listing exists; the CVSS vector (AV:N/AC:L/PR:N/UI:R) indicates low-complexity remote exploitability contingent on user interaction, and Mozilla has shipped a vendor-released patch in Firefox for iOS 152.0.
Cookie leakage in Firefox for iOS prior to 152.0 allows an attacker-controlled suffix domain to intercept cookies intended for a target site during PDF request handling. The browser's PDF loading code path applied partial rather than exact-origin domain matching when deciding which cookies to attach, meaning a domain such as 'evilbank.com' could satisfy a suffix match against 'bank.com' and receive that site's cookies. No active exploitation is confirmed, but the SSVC framework rates this as automatable with partial technical impact, making it a credible session-hijacking vector for users on unpatched versions.
Cross-site scripting in Firefox for iOS Reader View allows unauthenticated remote attackers to inject arbitrary markup via maliciously crafted JSON-LD metadata on attacker-controlled pages. When a victim activates Reader View on such a page, injected HTML executes in the context of an internal Firefox origin, leaking sensitive URL parameters that can be leveraged to access internal pages and achieve arbitrary JavaScript execution with elevated browser-origin trust. Mozilla patched this in Firefox for iOS 151.2 per MFSA2026-53; no public exploit code and no CISA KEV listing have been identified at time of analysis.
Reader View in Firefox for iOS executes arbitrary JavaScript due to an incorrect template substitution order, enabling cross-site scripting via JSON-LD data injection. The flaw affects all Firefox for iOS versions prior to 151.2 running on Apple iOS devices; unauthenticated remote attackers can exploit this by luring users to a malicious page and having them activate Reader View, after which attacker-controlled placeholder strings embedded in the page's structured data are processed as executable script. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, but the low attack complexity and no-auth-required access vector (per CVSS PR:N) make it feasible for opportunistic campaigns targeting iOS Firefox users.
Firefox for iOS misrepresents attacker-controlled domains as trusted origins through improper rendering of right-to-left Unicode characters and internationalized domain names (IDNs) in the link preview UI surface, enabling a spoofing/phishing attack against users on any iOS version prior to 151.1. The CVSS vector (PR:N/UI:R) indicates unauthenticated network-reachable exploitation contingent on user interaction with a crafted link. EPSS at the 5th percentile and SSVC exploitation status of 'none' confirm no active exploitation or public exploit code has been identified at time of analysis, positioning this as a targeted phishing risk rather than a broad automated threat.
Firefox for iOS Reader mode exposed an unauthenticated local HTTP server on the device, enabling a co-installed malicious application to request arbitrary URLs through that server and receive responses rendered with the authenticated user's session cookies. Affected versions are all Firefox for iOS releases prior to 151.0, confirmed by Mozilla Security Advisory MFSA2026-49. No public exploit code has been identified and CISA SSVC rates exploitation as none at time of analysis, but successful exploitation would allow silent exfiltration of authenticated web content from the victim's active browsing session.