MEDIUM 6.1
CVE-2025-11712
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.
CVSS v3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
0.0%
percentile 14.0%
Affected tracked apps
Vulnerable CPE configurations
| Vendor | Product | Platform | Versions | CPE 2.3 URI |
|---|---|---|---|---|
| mozilla | thunderbird | Windows | <140.4.0 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |
| mozilla | thunderbird | Windows | ≥141.0 <144.0 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |