GHSA-6q7m-p8cc-998rHighCVSS 8.1

Mattermost has a Missing Authorization vulnerability

Published
October 16, 2025
Last Modified
October 16, 2025

🔗 CVE IDs covered (1)

📋 Description

Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the OAuth state.

🎯 Affected products4

  • go/github.com/mattermost/mattermost/server/v8:< 8.0.0-20250807174701-e14175eb6539
  • go/github.com/mattermost/mattermost-server:>= 10.11.0, < 10.11.2
  • go/github.com/mattermost/mattermost-server:>= 10.10.0, < 10.10.3
  • go/github.com/mattermost/mattermost-server:>= 10.5.0, < 10.5.11

🔗 References (6)