CVE-2025-11711
MEDIUM severity · CVSS 6.5 · CWE-591
6.5CVSS MEDIUM
Summary
There was a way to change the value of JavaScript Object properties that were supposed to be non-writeable. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactNone
Integrity impactHigh
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected products we track (2)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2025-81/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-82/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-83/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-84/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-85/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1989978
- https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html