CVEvulnerability
CVE-2025-11712
6.1 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2025-10-14
- Last modified
- 2026-10-23
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 6.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-116
Description
A malicious page could have used the type attribute of an OBJECT tag to override the default browser behavior when encountering a web resource served without a content-type. This could have contributed to an XSS on a site that unsafely serves files without a content-type header. This vulnerability was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
Affected configurations
• mozilla firefox (< 140.4.0)
• mozilla firefox (< 144.0)
• mozilla thunderbird (< 140.4.0)
• mozilla thunderbird (>= 141.0 < 144.0)
Related
Weakness · CWE (1)
- CWE-116 Improper Encoding or Escaping of Output weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1979536 Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-81/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-83/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-84/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-85/ Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html lists.debian.org
- https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html lists.debian.org