CVE-2023-6547 Information

Description

Mattermost fails to validate team membership when a user attempts to access a playbook allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team got permissions to the playbook and was then removed from the team. 

Reference

https://mattermost.com/security-updates