CVE-2025-11712
Public on 2025-10-14
Modified on 2025-10-15
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.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Firefox Extra | firefox | 2025-10-27 | ALAS2FIREFOX-2025-044 | Fixed |
| Amazon Linux 2023 | firefox | 2025-10-27 | ALAS2023-2025-1246 | Fixed |
| Amazon Linux 2 - Core | thunderbird | 2025-10-27 | ALAS2-2025-3052 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
| NVD | CVSSv3 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |