Mattermost <10.7.0: System Manager AC Bypass via Team API
CVE-2025-3611 Published on May 30, 2025
Improper Access Control in Mattermost allows System Managers to view team details despite role restrictions
Mattermost versions 10.7.x <= 10.7.0, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fails to properly enforce access control restrictions for System Manager roles, allowing authenticated users with System Manager privileges to view team details they should not have access to via direct API requests to team endpoints, even when explicitly configured with 'No access' to Teams in the System Console.
Vulnerability Analysis
CVE-2025-3611 can be exploited with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2025-3611 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2025-3611
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Affected Versions
Mattermost:- Version 10.7.0 is affected.
- Version 10.5.0, <= 10.5.3 is affected.
- Version 9.11.0, <= 9.11.12 is affected.
- Version 10.8.0 is unaffected.
- Version 10.7.1 is unaffected.
- Version 10.5.4 is unaffected.
- Version 9.11.13 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.