Description
The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.
Problem types
WebChannel APIs susceptible to confused deputy attack
Product status
Credits
Andrew McCreight
References
lists.debian.org/debian-lts-announce/2025/01/msg00004.html
bugzilla.mozilla.org/show_bug.cgi?id=1915257
www.mozilla.org/security/advisories/mfsa2025-01/
www.mozilla.org/security/advisories/mfsa2025-02/
www.mozilla.org/security/advisories/mfsa2025-04/
www.mozilla.org/security/advisories/mfsa2025-05/
