CVE-2025-6425

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-6425
An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

4.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1717672 Issue Tracking Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-51/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-52/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-53/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-54/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-55/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
History

03 Jul 2025, 16:23

Type Values Removed Values Added
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
First Time Mozilla firefox
Mozilla
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1717672 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1717672 - Issue Tracking, Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-51/ - () https://www.mozilla.org/security/advisories/mfsa2025-51/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-52/ - () https://www.mozilla.org/security/advisories/mfsa2025-52/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-53/ - () https://www.mozilla.org/security/advisories/mfsa2025-53/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-54/ - () https://www.mozilla.org/security/advisories/mfsa2025-54/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-55/ - () https://www.mozilla.org/security/advisories/mfsa2025-55/ - Vendor Advisory

02 Jul 2025, 21:15

Type Values Removed Values Added
References
  • () https://www.mozilla.org/security/advisories/mfsa2025-54/ -
  • () https://www.mozilla.org/security/advisories/mfsa2025-55/ -
Summary (en) An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, and Firefox ESR < 128.12. (en) An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

25 Jun 2025, 15:15

Type Values Removed Values Added
CWE CWE-200
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.3
Summary
  • (es) Un atacante que enumerara recursos desde la extensión WebCompat podría haber obtenido un UUID persistente que identificaba el navegador y persistía entre contenedores y el modo de navegación normal/privado, pero no entre perfiles. Esta vulnerabilidad afecta a Firefox &lt; 140, Firefox ESR &lt; 115.25 y Firefox ESR &lt; 128.12.

24 Jun 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-24 13:15

Updated : 2025-07-03 16:23

NVD link : CVE-2025-6425

Mitre link : CVE-2025-6425

CVE.ORG link : CVE-2025-6425

JSON object : View

Products Affected

mozilla

  • firefox
CWE
CWE-200

Exposure of Sensitive Information to an Unauthorized Actor