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.

INFO

Published Date :

2025-10-14T12:27:35.544Z

Last Modified :

2026-04-13T14:29:40.795Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2025-11712 vulnerability.

Vendors Products
Mozilla
  • Firefox
  • Firefox Esr
  • Thunderbird
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-11712.

URL Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1979536 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html cve-icon
https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-11712 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-11712 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-81/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-83/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-83/#CVE-2025-11712 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-84/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-85/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-85/#CVE-2025-11712 cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact