Same-origin policy bypass in the Layout component (Mozilla Firefox)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.32 % · percentile 25 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mozilla
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-942 — Permissive Cross-domain Security Policy with Untrusted Domains
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
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | CISA-ADP |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2025-29560
- GCVE · GCVE-0-2025-10529
CERT-FR advisories
- CERTFR-2025-AVI-0797 — Multiples vulnérabilités dans les produits Mozilla · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*< 140.3.0cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*< 143.0cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*< 143.0
Affected products
| Product | Versions |
|---|---|
| Mozilla · Firefox | unaffected 140.3 ≤ 140.* ; unaffected 143 ≤ * |
| Mozilla · Thunderbird | unaffected 140.3 ≤ 140.* ; unaffected 143 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |