CVE-2025-2817
HIGH EPSS 40.0%
Published Apr 29, 20251y ago · Modified Jun 17, 20261w ago
8.8 CVSS 3.1
Published Apr 29, 2025 1y ago
Last Modified Jun 17, 2026 1w ago
Description
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
40.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-22 Path Traversal Resource Mgmt
Affected Products 5
References 7
- bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1917536
- lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00022.html
- mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-28/
- mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-29/
- mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-30/
- mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-31/
- mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-32/
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.