What’s Vulnerable › Vulnerabilities
CVE-2025-46702: Mattermost Playbooks allows privilege escalation through improper access control in playbook run participant management
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-06-30 · updated 2026-06-17
- Weakness: CWE-863
Description
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 enforce channel member management permissions when adding participants to playbook runs. This allows authenticated users with member-level permissions to bypass system admin restrictions and add or remove users to/from private channels via the playbook run participants feature, even when the 'Manage Members' permission has been explicitly removed. This can lead to unauthorized access to sensitive channel content and allow guest users to gain channel management privileges.
Affected products
- Mattermost: from 9.11.0 before 9.11.16; from 10.5.0 before 10.5.6; from 10.6.0 before 10.6.6; from 10.7.0 before 10.7.3; 10.8.0, 10.8.0-rc1, 10.8.0-rc2, 10.8.0-rc3 — fixed in 10.5.6, 10.6.6, 10.7.3, 9.11.16
How to fix
Upgrade to a fixed version: Mattermost 10.5.6, 10.6.6, 10.7.3, 9.11.16. Check the vendor advisory for mitigations.
References
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