CVE-2025-1931
HIGH severity · CVSS 7.5 · Use-after-free
7.5CVSS HIGH
Summary
It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2025-14/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-15/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-16/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-17/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-18/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1944126
- https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html