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.
History

Wed, 15 Oct 2025 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-591
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N'}


Wed, 15 Oct 2025 12:30:00 +0000

Type Values Removed Values Added
Title thunderbird: firefox: Some non-writable Object properties could be modified
Weaknesses CWE-284
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

threat_severity

Important


Tue, 14 Oct 2025 13:00:00 +0000

Type Values Removed Values Added
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

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2025-10-14T12:27:34.470Z

Updated: 2025-10-15T13:29:42.167Z

Reserved: 2025-10-13T19:50:05.343Z

Link: CVE-2025-11711

cve-icon Vulnrichment

Updated: 2025-10-15T13:22:23.952Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-14T13:15:37.330

Modified: 2025-10-15T14:15:40.657

Link: CVE-2025-11711

cve-icon Redhat

Severity : Important

Publid Date: 2025-10-14T12:27:34Z

Links: CVE-2025-11711 - Bugzilla