What is CVE-2025-20051?

CVE-2025-20051 is a critical-severity vulnerability in Mattermost, classified under Path Traversal. CVSS score: 9.9/10. Published 2025-02-24.

How severe is CVE-2025-20051?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Path Traversal in Mattermost

CVE-2025-20051

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 input when patching and duplicating a board, which allows a user to read any arbitrary file on the system via duplicating…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.006 (44.2th percentile) — read the EPSS interpretation.

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.

Affected products

Mattermost — versions 10.4.0, 9.11.0, 10.3.0
Mattermost Mattermost_server

Weakness classification (CWE)

CWE-22 — Path Traversal

References

responsibledisclosure@mattermost.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-20051?: CVE-2025-20051 is a critical-severity vulnerability in Mattermost, classified under Path Traversal. CVSS score: 9.9/10. Published 2025-02-24.
How severe is CVE-2025-20051?: Critical severity. CVSS v3 base score is 9.9 out of 10.