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CVE PROGRAM SOURCE RECORD8.3 High

CVE-2026-3524

Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost Plugin Legal Hold versions <=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621

Affected products

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

Mattermost Mattermost

Default version status: unaffected

  • 0 to ≤ 1.1.4affected
  • 1.1.5unaffected

References