CVE-2025-10527
HIGH severity · CVSS 7.1 · Use-after-free
7.1CVSS HIGH
Summary
Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactLow
Integrity impactLow
Availability impactLow
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
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/mfsa2025-73/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-75/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-77/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-78/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1984825
- https://lists.debian.org/debian-lts-announce/2025/09/msg00020.html
- https://lists.debian.org/debian-lts-announce/2025/09/msg00026.html