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Medium 6.5Published Sep 16, 2025
CVE-2025-10529Same-origin policy bypass in the Layout component.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-942
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
mozilla firefox mozilla:firefox | before 140.3.0; before 143.0 | NVD |
mozilla thunderbird mozilla:thunderbird | before 143.0 | NVD |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1970490permissions-required
- https://www.mozilla.org/security/advisories/mfsa2025-73/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2025-75/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2025-77/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2025-78/vendor-advisory
- https://lists.debian.org/debian-lts-announce/2025/09/msg00020.html
- https://lists.debian.org/debian-lts-announce/2025/09/msg00026.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.