| Package | Affected versions | Patched versions |
|---|---|---|
| mattermost server | ≥ 9.5.0, < 9.5.9 | 9.5.9 |
Mattermost versions 9.5.x <= 9.5.8 fail to properly authorize access to archived channels when viewing archived channels is disabled, which allows an attacker to view posts and files of archived channels via file links.
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