CVE-2025-10529
Same-origin policy bypass in the Layout component
- State
- Published
- Severity
- 6.5 Medium
- Published
- Sep 16, 2025
- Updated
- Apr 13, 2026
- Reserved
- Sep 16, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | CISA-ADP |
Weaknesses
- CWE-942 Permissive Cross-domain Policy with Untrusted Domains
Affected Products
| Product | Versions |
|---|---|
FirefoxMozilla |
|
ThunderbirdMozilla |
|
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/msg00026.html
- https://lists.debian.org/debian-lts-announce/2025/09/msg00020.html
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