VULNERABILITY

MFSA2025-28 Firefox: Security Vulnerabilities fixed in Firefox 138 (CVE-2025-2817)

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MFSA2025-28 Firefox: Security Vulnerabilities fixed in Firefox 138 (CVE-2025-2817)

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
04/29/2025
Created
05/01/2025
Added
04/30/2025
Modified
05/01/2025

Description

Mozilla Firefox's update mechanism allowed a medium-integrity user process to interfere with the SYSTEM-level updater by manipulating the file-locking behavior. By injecting code into the user-privileged process, an attacker could bypass intended access controls, allowing SYSTEM-level file operations on paths controlled by a non-privileged user and enabling privilege escalation. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Firefox ESR < 115.23, Thunderbird < 138, and Thunderbird ESR < 128.10.

Solution(s)

  • mozilla-firefox-upgrade-138_0

References

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