CVE-2025-2817CWE-22path-traversal

CVE-2025-2817

High · published April 29, 2025

CVSS v3.1
8.8
EPSS
1%
Percentile
50.8
In the wild
Unconfirmed
What it is

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 was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00656 · 50.8th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2025-04-29T18:15Z
Affected products (5)
ProductVersionsFixed in
mozilla/firefox< 115.23.0115.23.0
mozilla/firefox< 138.0138.0
mozilla/firefox≥ 116.0, < 128.10.0128.10.0
mozilla/thunderbird< 128.10.0128.10.0
mozilla/thunderbird≥ 129.0, < 138.0138.0
References (7)
https://bugzilla.mozilla.org/show_bug.cgi?id=1917536 · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-28/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-29/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-30/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-31/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-32/ · [email protected]https://lists.debian.org/debian-lts-announce/2025/05/msg00022.html · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 29 APR 13:13Z
    Privilege escalation in Thunderbird Updater
    cvelistv5