Path Traversal in Mattermost
CVE-2025-6233
Mattermost versions 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to sanitize input paths of file attachments in the bulk import JSONL file, which allows a system admin to read arbitrary system files via path traversal.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.004 (30.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Mattermost — versions 10.8.0, 10.7.0, 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-2025-6233?
- CVE-2025-6233 is a medium-severity vulnerability in Mattermost, classified under Path Traversal. CVSS score: 6.8/10. Published 2025-07-18.
- How severe is CVE-2025-6233?
- Medium severity. CVSS v3 base score is 6.8 out of 10.
- Is CVE-2025-6233 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.