| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 10.5.0+incompatible, < 10.5.3+incompatible≥ 9.11.0+incompatible, < 9.11.12+incompatible | 10.5.3+incompatible9.11.12+incompatible |
| github.com/mattermost/mattermost-server/v5 | all versions | |
| github.com/mattermost/mattermost-server/v6 | all versions | |
| github.com/mattermost/mattermost/server/v8 | ≥ 10.5.0, < 10.5.3≥ 9.11.0, < 9.11.12< 8.0.0-20250411064244-844447fbd57c | 10.5.39.11.128.0.0-20250411064244-844447fbd57c |
| mattermost server | ≥ 10.5.0, < 10.5.3≥ 9.11.0, < 9.11.12 | 10.5.39.11.12 |
Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.
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