Medium severity4.3NVD Advisory· Published Jun 24, 2025· Updated Apr 13, 2026
CVE-2025-6425
CVE-2025-6425
Description
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 was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.
Affected products
2cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <140.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <115.25.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
8- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-51/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-52/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-53/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-54/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-55/nvdVendor Advisory
- lists.debian.org/debian-lts-announce/2025/06/msg00029.htmlnvd
- lists.debian.org/debian-lts-announce/2025/07/msg00002.htmlnvd
News mentions
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