Path Traversal in Mattermost
CVE-2025-25279
Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate board blocks when importing boards which allows an attacker could read any arbitrary file on the system via importing and exporting a specially crafted import archive in Boards.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.240 (97.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.242 · newest: 0.240 · change: -0.002
Affected products
- Mattermost — versions 10.4.0, 9.11.0, 10.3.0
- Mattermost Server
Weakness classification (CWE)
Public proof-of-concept exploits
References
- mattermost.com/security-updates (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-25279?
- CVE-2025-25279 is a critical-severity vulnerability in Mattermost, classified under Path Traversal. CVSS score: 9.9/10. Published 2025-02-24.
- How severe is CVE-2025-25279?
- Critical severity. CVSS v3 base score is 9.9 out of 10.
- Is CVE-2025-25279 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.