CVE-2025-11711

Description

There was a way to change the value of JavaScript Object properties that were supposed to be non-writeable. This vulnerability affects Firefox < 144, Firefox ESR < 115.29, Firefox ESR < 140.4, Thunderbird < 144, and Thunderbird < 140.4.

References

https://www.mozilla.org/security/advisories/mfsa2025-85/

https://www.mozilla.org/security/advisories/mfsa2025-84/

https://www.mozilla.org/security/advisories/mfsa2025-83/

https://www.mozilla.org/security/advisories/mfsa2025-82/

https://www.mozilla.org/security/advisories/mfsa2025-81/

https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html

https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1989978

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

EPSS