Due to insufficient escaping of special characters in the "copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 138 and Thunderbird 138.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Mozilla
  • Firefox
  • Thunderbird

Configuration 1 [-]

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*

No data.

References
Link Providers
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1949994%2C1956698%2C1960198 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-4089 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-4089 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-28/ cve-icon cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-31/ cve-icon cve-icon cve-icon
History

Mon, 13 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
Description Due to insufficient escaping of special characters in the "copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability affects Firefox < 138 and Thunderbird < 138. Due to insufficient escaping of special characters in the "copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 138 and Thunderbird 138.
Title firefox: thunderbird: Potential local code execution in "copy as cURL" command Potential local code execution in "copy as cURL" command

Fri, 09 May 2025 20:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
Vendors & Products Mozilla
Mozilla firefox
Mozilla thunderbird

Fri, 02 May 2025 02:45:00 +0000

Type Values Removed Values Added
Title firefox: thunderbird: Potential local code execution in "copy as cURL" command
Weaknesses CWE-138
References
Metrics threat_severity

None

 threat_severity

Moderate

Tue, 29 Apr 2025 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-77
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 29 Apr 2025 13:30:00 +0000

Type Values Removed Values Added
Description Due to insufficient escaping of special characters in the "copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability affects Firefox < 138 and Thunderbird < 138.
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-04-13T14:28:48.766Z

Reserved: 2025-04-29T13:13:44.377Z

Link: CVE-2025-4089

cve-icon Vulnrichment

Updated: 2025-04-29T15:38:41.023Z

cve-icon NVD

Status : Modified

Published: 2025-04-29T14:15:35.537

Modified: 2026-04-13T15:17:00.560

Link: CVE-2025-4089

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-04-29T13:13:45Z

Links: CVE-2025-4089 - Bugzilla