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CVE PROGRAM SOURCE RECORD4.3 Medium

CVE-2025-27571

Channel metadata visible in archived channels despite configuration setting

Description

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the "Allow Users to View Archived Channels" configuration when fetching channel metadata of a post from archived channels, which allows authenticated users to access such information when a channel is archived.

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

  • 10.5.0 to ≤ 10.5.1affected
  • 10.4.0 to ≤ 10.4.3affected
  • 9.11.0 to ≤ 9.11.9affected
  • 10.6.0unaffected
  • 10.5.2unaffected
  • 10.4.4unaffected
  • 9.11.10unaffected

References