CVE-2023-4106: Mattermost

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Mattermost fails to check if the requesting user is a guest before performing different actions to public playbooks, resulting a guest being able to view, join, edit, export and archive public playbooks.

Affected products

• Mattermost Mattermost: from 7.8.0, before 7.8.8 (fixed in 7.8.8); from 7.9.0, before 7.9.6 (fixed in 7.9.6); from 7.10.0, before 7.10.4 (fixed in 7.10.4)

Published 2023-08-11. Last modified 2026-06-17.