Auth bypass in Mattermost
CVE-2025-3913
Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to properly validate permissions when changing team privacy settings, allowing team administrators without the 'invite user' permission to access and modify team invite IDs via the /api/v4/teams/:teamId/privacy endpoint.
Vulnerability class: Broken Access Control
EPSS: 0.003 (18.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Mattermost — versions 10.7.0, 10.6.0, 10.5.0
- Mattermost Mattermost_server
Weakness classification (CWE)
Public proof-of-concept exploits
References
- responsibledisclosure@mattermost.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-3913?
- CVE-2025-3913 is a medium-severity vulnerability in Mattermost, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2025-05-29.
- How severe is CVE-2025-3913?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-3913 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.