CVE-2025-10529

Description

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.

Affected Platforms

Weakness Type

CWE-942

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1970490
• https://www.mozilla.org/security/advisories/mfsa2025-73/
• https://www.mozilla.org/security/advisories/mfsa2025-75/
• https://www.mozilla.org/security/advisories/mfsa2025-77/
• https://www.mozilla.org/security/advisories/mfsa2025-78/
• https://lists.debian.org/debian-lts-announce/2025/09/msg00020.html