CVE-2025-6425 | THREATINT

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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 affects Firefox < 140, Firefox ESR < 115.25, and Firefox ESR < 128.12.

Reserved 2025-06-20 | Published 2025-06-24 | Updated 2025-06-24 | Assigner mozilla

Problem types

The WebCompat WebExtension shipped with Firefox exposed a persistent UUID

Product status

Any version before 140

affected

Any version before 115.25

affected

Any version before 128.12

affected

Credits

Rob Wu

References

bugzilla.mozilla.org/show_bug.cgi?id=1717672

www.mozilla.org/security/advisories/mfsa2025-51/

www.mozilla.org/security/advisories/mfsa2025-52/

www.mozilla.org/security/advisories/mfsa2025-53/

cve.org (CVE-2025-6425)

nvd.nist.gov (CVE-2025-6425)

Download JSON

https://cve.threatint.eu/CVE/CVE-2025-6425

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