| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 10.11.0, < 10.11.3≥ 10.5.0, < 10.5.11all versions | 10.11.310.5.11 |
| github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250822090405-e8c7e7d0252b | 8.0.0-20250822090405-e8c7e7d0252b |
| mattermost server | ≥ 10.11.0, < 10.11.3≥ 10.5.0, < 10.5.11 | 10.11.310.5.11 |
Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when accessing channel information which allows guest users to discover active public channels and their metadata via the /api/v4/teams/{team_id}/channels/ids endpoint
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