CVE-2023-27264: Mattermost

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A missing permissions check in Mattermost Playbooks in Mattermost allows an attacker to modify a playbook via the /plugins/playbooks/api/v0/playbooks/[playbookID] API.

Affected products

• Mattermost Mattermost: up to and including 7.1.4; version 7.4.0 only; version 7.5.0 only; version 7.5.1 only

Published 2023-02-27. Last modified 2026-06-17.