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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2025-2817

Privilege escalation in Thunderbird Updater

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Status
Published
Published
Updated
Assigning organization
mozilla

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mozilla Firefox

  • 115.23 to ≤ 115.*unaffected
  • 128.10 to ≤ 128.*unaffected
  • 138 to ≤ *unaffected

Mozilla Thunderbird

  • 128.10 to ≤ 128.*unaffected
  • 138 to ≤ *unaffected

References