Vulnerability Monitor

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CVE-2025-2817

Thunderbird'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 < 128.10.

Published

2025-04-29T14:15:32.220

Last Modified

2025-06-13T18:53:56.077

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

Weaknesses

Type: Secondary
CWE-22

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 115.23.0	Yes
Application	mozilla	firefox	< 138.0	Yes
Application	mozilla	firefox	< 128.10.0	Yes
Application	mozilla	thunderbird	< 128.10.0	Yes
Application	mozilla	thunderbird	< 138.0	Yes

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1917536 Permissions Required ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-28/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-29/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-30/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-31/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-32/ Vendor Advisory ([email protected])