MEDIUM 5.4 Go
Mattermost fails to properly invalidate personal access tokens upon user deactivation
GHSA-mc2f-jgj6-6cp3 · CVE-2025-3230 · GO-2025-3731
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Description
Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fails to properly invalidate personal access tokens upon user deactivation, allowing deactivated users to maintain full system access by exploiting access token validation flaws via continued usage of previously issued tokens.
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