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CVE PROGRAM SOURCE RECORD4.3 Medium

CVE-2026-2461

Missing authorization check allows unauthorized modification of other users' comments on a board

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559

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 ≤ 11.0.3affected
  • 0 to ≤ 11.2.2affected
  • 0 to ≤ 10.10.11affected
  • 11.4.0unaffected
  • 11.3.1unaffected
  • 11.2.3unaffected
  • 10.11.11unaffected

References