Mattermost fails to properly enforce access control restrictions for System Manager roles
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.
02 / AFFECTED SOFTWARE
Affected packages
47 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Mattermost fails to properly enforce access control restrictions for System Manager roles in github.com/mattermost/mattermost-server
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.
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.
05 / REFERENCES
Further evidence
- https://github.com/advisories/GHSA-86jg-35xj-3vv5
- https://github.com/mattermost/mattermost/commit/6f33b721de76b39a7714bfe0d5e9c1306869a3e3
- https://mattermost.com/security-updates
- https://nvd.nist.gov/vuln/detail/CVE-2025-3611
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/3xxx/CVE-2025-3611.json
- https://github.com/mattermost/mattermost