Path Traversal in Mattermost
CVE-2025-9079
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to validate import directory path configuration which allows admin users to execute arbitrary code via malicious plugin upload to prepackaged plugins directory
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.006 (45.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Mattermost — versions 10.8.0, 10.5.0, 9.11.0
- Mattermost Mattermost_server
Weakness classification (CWE)
Public proof-of-concept exploits
References
- responsibledisclosure@mattermost.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-9079?
- CVE-2025-9079 is a high-severity vulnerability in Mattermost, classified under Path Traversal. CVSS score: 8.0/10. Published 2025-09-19.
- How severe is CVE-2025-9079?
- High severity. CVSS v3 base score is 8.0 out of 10.
- Is CVE-2025-9079 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.