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.
This Cyber News was published on www.tenable.com. Publication date: Tue, 12 Dec 2023 22:41:03 +0000