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.

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…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.552 (98.1th 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

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

References

mattermost.com/security-updates

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.