What is CVE-2025-13321?

CVE-2025-13321 is a low-severity vulnerability in Mattermost, classified under Insertion of Sensitive Information into Log File. CVSS score: 3.3/10. Published 2025-12-17.

How severe is CVE-2025-13321?

Low severity. CVSS v3 base score is 3.3 out of 10.

Information disclosure in Mattermost

CVE-2025-13321

Mattermost Desktop App versions <6.0.0 fail to sanitize sensitive information from Mattermost logs and clear data on server deletion which allows an attacker with access to the users system to gain access to potentially sensitive information via reading the application logs.

EPSS: 0.001 (1.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Mattermost — versions 0, 6.0.0
Mattermost Mattermost_desktop

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

responsibledisclosure@mattermost.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-13321?: CVE-2025-13321 is a low-severity vulnerability in Mattermost, classified under Insertion of Sensitive Information into Log File. CVSS score: 3.3/10. Published 2025-12-17.
How severe is CVE-2025-13321?: Low severity. CVSS v3 base score is 3.3 out of 10.