Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to properly validate permissions for the API endpoint /plugins/playbooks/api/v0/signal/keywords/ignore-thread, allowing any user or attacker to delete posts containing actions created by the Playbooks bot, even without channel access or appropriate permissions.
2025-04-24T07:15:31.740
2025-09-29T21:06:37.463
Analyzed
CVSSv3.1: 3.1 (LOW)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | mattermost | mattermost_server | < 9.11.11 | Yes |
| Application | mattermost | mattermost_server | < 10.4.3 | Yes |
| Application | mattermost | mattermost_server | 10.5.0 | Yes |