CVE-2024-29215: Mattermost Server

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

Mattermost versions 9.5.x <= 9.5.3, 9.7.x <= 9.7.1, 9.6.x <= 9.6.1, 8.1.x <= 8.1.12 fail to enforce proper access control which allows a user to run a slash command in a channel they are not a member of via linking a playbook run to that channel and running a slash command as a playbook task command.

Affected products

• Mattermost Mattermost Server: from 8.1.0, before 8.1.13 (fixed in 8.1.13); from 9.5.0, before 9.5.4 (fixed in 9.5.4); from 9.6.0, before 9.6.2 (fixed in 9.6.2); from 9.7.0, before 9.7.2 (fixed in 9.7.2)

Published 2024-05-26. Last modified 2026-06-17.