GHSA-vg67-chm7-8m3jHighCVSS 5.5

Mattermost allows remote actor to create/update/delete posts in arbitrary channels

Published
August 1, 2024
Last Modified
July 9, 2025

🔗 CVE IDs covered (1)

📋 Description

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to properly validate synced posts, when shared channels are enabled,  which allows a malicious remote to create/update/delete arbitrary posts in arbitrary channels

🎯 Affected products6

  • go/github.com/mattermost/mattermost/server/v8:>= 9.5.0, < 9.5.7
  • go/github.com/mattermost/mattermost/server/v8:>= 9.7.0, < 9.7.6
  • go/github.com/mattermost/mattermost/server/v8:>= 9.8.0, < 9.8.2
  • go/github.com/mattermost/mattermost/server/v8:= 9.9.0
  • go/github.com/mattermost/mattermost/server/v8:< 8.0.0-20240619142046-8181a9ddffc0
  • go/github.com/mattermost/mattermost:< 5.3.2-0.20240619142046-8181a9ddffc0

🔗 References (4)