| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 9.0.0+incompatible, < 9.4.2+incompatible | 9.4.2+incompatible |
| github.com/mattermost/mattermost-server/v5 | all versions | |
| github.com/mattermost/mattermost-server/v6 | all versions | |
| github.com/mattermost/mattermost/server/v8 | ≥ 9.0.0, < 9.4.2< 8.1.9all versions | 9.4.28.1.9 |
| mattermost server | ≥ 8.1.0, < 8.1.9≥ 9.4.0, < 9.4.2 | 8.1.99.4.2 |
A race condition in Mattermost versions 8.1.x before 8.1.9, and 9.4.x before 9.4.2 allows an authenticated attacker to gain unauthorized access to individual posts' contents via carefully timed post creation while another user deletes posts.
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