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Thunderbird CVE-2025-8030

HIGH
Code Injection (CWE-94)
2025-07-22 security@mozilla.org
Mozilla RCE Code Injection Thunderbird Red Hat Suse
8.1
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
8.1 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
SUSE
HIGH
qualitative
Red Hat
6.1 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

1
Analysis Generated
Apr 13, 2026 - 15:40 vuln.today

DescriptionCVE.org

Insufficient escaping in the “Copy as cURL” feature could potentially be used to trick a user into executing unexpected code. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.

AnalysisAI

Firefox and Thunderbird's 'Copy as cURL' feature improperly escapes shell metacharacters, allowing remote attackers to trick users into executing arbitrary commands when pasting copied network requests into a terminal. Affects Firefox <141, Firefox ESR <128.13/140.1, and Thunderbird <141, <128.13/140.1. Vendor-released patches available across all affected branches. CVSS 8.1 with network attack vector requiring user interaction; no public exploit identified at time of analysis. EPSS data not provided but social engineering dependency limits automated exploitation risk.

Technical ContextAI

This vulnerability (CWE-94: Improper Control of Generation of Code) stems from insufficient sanitization in Mozilla's developer tools 'Copy as cURL' functionality, which converts browser network requests into command-line cURL syntax. When a user copies a malicious HTTP request (crafted by an attacker-controlled server or injected via XSS) and pastes the generated cURL command into a shell, unescaped shell metacharacters (such as backticks, dollar signs, semicolons, or pipe operators) embedded in HTTP headers, parameters, or URLs can break out of the intended cURL context and execute arbitrary system commands. The CPE data confirms impact across Mozilla Firefox (standard and ESR channels versions <141, <128.13, <140.1) and Thunderbird (standard and ESR versions <141, <128.13, <140.1), spanning both the email client and web browser product lines that share the underlying Gecko codebase and developer tooling infrastructure.

RemediationAI

Upgrade to patched versions immediately: Firefox 141 or later, Firefox ESR 128.13/140.1 or later, Thunderbird 141 or later, or Thunderbird ESR 128.13/140.1 or later. Mozilla has released fixes across all affected product branches as documented in security advisories MFSA2025-56, MFSA2025-58, MFSA2025-59, MFSA2025-61, MFSA2025-62, and MFSA2025-63 available at https://www.mozilla.org/security/advisories/. Organizations using Firefox/Thunderbird ESR should apply the ESR-specific patches (128.13 or 140.1 depending on deployed ESR track). As a procedural workaround until patching, security teams should advise developers to manually review and sanitize all cURL commands generated from browser developer tools before execution, particularly when analyzing untrusted websites or debugging third-party integrations. Consider implementing organizational policies requiring paste-blocking terminal configurations or wrapper scripts that validate cURL syntax before execution in high-security development environments.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
Container suse/sl-micro/6.0/kvm-os-container:2.1.3-4.11 Affected
Image SLES12-SP5-SAP-Azure-LI-BYOS-Production Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production Affected
Image SLES15-SP4-SAP-Azure-LI-BYOS Image SLES15-SP4-SAP-Azure-LI-BYOS-Production Image SLES15-SP4-SAP-Azure-VLI-BYOS Image SLES15-SP4-SAP-Azure-VLI-BYOS-Production Affected
Image SLES15-SP5-SAP-Azure-LI-BYOS Image SLES15-SP5-SAP-Azure-LI-BYOS-Production Image SLES15-SP5-SAP-Azure-VLI-BYOS Image SLES15-SP5-SAP-Azure-VLI-BYOS-Production Affected
Image SLES15-SP6-SAP-Azure-LI-BYOS Image SLES15-SP6-SAP-Azure-LI-BYOS-Production Image SLES15-SP6-SAP-Azure-VLI-BYOS Image SLES15-SP6-SAP-Azure-VLI-BYOS-Production Image SLES15-SP7-SAP-Azure-LI-BYOS-Production Image SLES15-SP7-SAP-Azure-VLI-BYOS-Production Affected

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CVE-2025-8030 vulnerability details – vuln.today
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