CVE-2025-11712

Oct. 14, 2025, 7:36 p.m.

None
No Score

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 affects Firefox < 144, Firefox ESR < 140.4, Thunderbird < 144, and Thunderbird < 140.4.

Product(s) Impacted

Vendor Product Versions
Mozilla
  • Firefox
  • Thunderbird
  • <144
  • <144

Weaknesses

Common security weaknesses mapped to this vulnerability.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a mozilla firefox <144 / / / / / / /
a mozilla thunderbird <144 / / / / / / /

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1979536
https://www.mozilla.org/security/advisories/mfsa2025-81/
https://www.mozilla.org/security/advisories/mfsa2025-83/
https://www.mozilla.org/security/advisories/mfsa2025-84/
https://www.mozilla.org/security/advisories/mfsa2025-85/

Tags

security@mozilla.org
2025-10-14
CVE-2025-11712

Timeline

Published: Oct. 14, 2025, 1:15 p.m.
Last Modified: Oct. 14, 2025, 7:36 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

security@mozilla.org

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.