CVE-2025-2817

CVE Details

Release Date:	2025-04-29
Impact:	Important	What is this?

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 affects Firefox < 138, Firefox ESR < 128.10, Firefox ESR < 115.23, Thunderbird < 138, and Thunderbird < 128.10.

See more information about CVE-2025-2817 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	8.5
Vector String:	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Version:	3.1
Attack Vector:	Network
Attack Complexity:	High
Privileges Required:	Low
User Interaction:	None
Scope:	Changed
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (firefox)	ELSA-2025-4751	2025-05-30
Oracle Linux version 8 (firefox)	ELSA-2025-4458	2025-05-06
Oracle Linux version 8 (thunderbird)	ELSA-2025-4797	2025-05-12
Oracle Linux version 9 (firefox)	ELSA-2025-4443	2025-05-05
Oracle Linux version 9 (firefox)	ELSA-2025-7428	2025-05-21
Oracle Linux version 9 (thunderbird)	ELSA-2025-4460	2025-05-05