Medium severity6.1NVD Advisory· Published Oct 14, 2025· Updated Apr 13, 2026
CVE-2025-11712
CVE-2025-11712
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 products
3cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <144.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <140.4.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
7- www.mozilla.org/security/advisories/mfsa2025-81/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-83/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-84/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-85/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions Required
- lists.debian.org/debian-lts-announce/2025/10/msg00015.htmlnvd
- lists.debian.org/debian-lts-announce/2025/10/msg00031.htmlnvd
News mentions
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