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Thunderbird CVE-2025-11713

HIGH
Improper Encoding or Escaping of Output (CWE-116)
2025-10-14 security@mozilla.org
Mozilla Information Disclosure Microsoft 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 - 15:43 vuln.today

DescriptionCVE.org

Insufficient escaping in the “Copy as cURL” feature could have been used to trick a user into executing unexpected code on Windows. This did not affect the application when running on other operating systems. This vulnerability was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.

AnalysisAI

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.

Technical ContextAI

This vulnerability stems from CWE-116 (Improper Encoding or Escaping of Output) in Mozilla's developer tools implementation. The 'Copy as cURL' feature generates command-line syntax from network requests captured in browser DevTools. On Windows systems, insufficient escaping of special characters in the generated cURL commands allows injection of arbitrary shell metacharacters. When users paste the copied cURL command into cmd.exe or PowerShell, the unescaped input can break out of the intended command context and execute attacker-controlled code. This is a platform-specific vulnerability due to Windows shell parsing differences compared to Unix shells. The affected products per CPE data are Mozilla Firefox (both standard and ESR channels) and Mozilla Thunderbird across all distribution channels, but exploitation is constrained to Windows operating systems only.

RemediationAI

Vendor-released patches are available for all affected products. Upgrade Firefox to version 144 or later for standard releases, or Firefox ESR to version 140.4 or later for extended support deployments. Upgrade Thunderbird to version 144 or later for standard releases, or Thunderbird 140.4 or later for ESR versions. Updates can be applied through Mozilla's automatic update mechanism or manual download from mozilla.org. For enterprise environments unable to immediately patch, implement temporary mitigation by instructing users to manually review and sanitize any cURL commands copied from DevTools before execution, particularly checking for unexpected shell metacharacters, backticks, pipe symbols, or command separators. Disable or restrict use of developer tools in managed environments where not operationally required. Detailed security advisories with complete remediation guidance available at https://www.mozilla.org/security/advisories/mfsa2025-81/ through mfsa2025-85/.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
Container suse/sl-micro/6.0/baremetal-os-container:latest Container suse/sl-micro/6.0/base-os-container:latest Container suse/sl-micro/6.0/kvm-os-container:latest Container suse/sl-micro/6.0/rt-os-container:latest Container suse/sl-micro/6.1/baremetal-os-container:2.2.0-4.10 Container suse/sl-micro/6.1/base-os-container:2.2.0-4.9 Container suse/sl-micro/6.1/kvm-os-container:2.2.0-4.8 Container suse/sl-micro/6.1/rt-os-container:2.2.0-4.9 Affected
Container suse/sl-micro/6.0/toolbox:latest Affected
Image SL-Micro-Azure Image SL-Micro-BYOS-Azure Image SL-Micro-BYOS-EC2 Image SL-Micro-BYOS-GCE Image SL-Micro-EC2 Image SLE-Micro Image SLE-Micro-Azure Image SLE-Micro-BYOS Image SLE-Micro-BYOS-Azure Image SLE-Micro-BYOS-EC2 Image SLE-Micro-BYOS-GCE Image SLE-Micro-EC2 Image SLE-Micro-GCE Image SUSE-Multi-Linux-Manager-Proxy-BYOS-Azure Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-Azure-llc Image SUSE-Multi-Linux-Manager-Server-Azure-ltd Image SUSE-Multi-Linux-Manager-Server-BYOS-Azure Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-EC2-llc Image SUSE-Multi-Linux-Manager-Server-EC2-ltd 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 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 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-2025-11713 vulnerability details – vuln.today
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