CVE-2025-0237
MEDIUM severity · CVSS 5.4 · Incorrect authorization
5.4CVSS MEDIUM
Summary
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 was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactLow
Integrity impactLow
Availability impactNone
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Affected products we track (2)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2025-01/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-02/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-04/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-05/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1915257
- https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html