CVE-2025-11712

MEDIUM EPSS 16.2%
Published Oct 14, 20258mo ago · Modified Jun 17, 20261w ago
6.1 CVSS 3.1
Medium
Find Similar
Published Oct 14, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
6.1
Exploitability
2.8
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
16.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-116

Affected Products 4

VendorProductVersionRange
mozillafirefox* <140.4.0
mozillafirefox* <144.0
mozillathunderbird* <140.4.0
mozillathunderbird*≥141.0  –  <144.0

References 7

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1979536
    Issue TrackingPermissions Required
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-81/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-83/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-84/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-85/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.