Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked pri…
Severity medium: primary CNA CVSS 4.3 v3.1 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2025-06-30T16:51:13.979Z. Updated 2025-06-30T20:48:41.938Z.