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Untriaged
Permalink CVE-2026-2461
4.3 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): LOW
  • Privileges required (PR): LOW
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): NONE
  • Integrity impact (I): LOW
  • Availability impact (A): NONE
created 6 days, 20 hours ago
Missing authorization check allows unauthorized modification of other users' comments on a board

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

References

Affected products

Mattermost
  • =<11.2.2
  • =<11.0.3
  • ==11.3.1
  • =<10.10.11
  • ==10.11.11
  • ==11.2.3
  • ==11.4.0

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