CVE-2025-10529
MEDIUM severity · CVSS 6.5 · CWE-942
6.5CVSS MEDIUM
Summary
Same-origin policy bypass in the Layout 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 interactionNone
Confidentiality impactLow
Integrity impactLow
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/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/mfsa2025-73/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=1970490
- https://lists.debian.org/debian-lts-announce/2025/09/msg00020.html
- https://lists.debian.org/debian-lts-announce/2025/09/msg00026.html