CVE-2025-13321: Mattermost Desktop

Low severity, CVSS 3.3. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Mattermost Mattermost Desktop: before 6.0.0 (fixed in 6.0.0)

Published 2025-12-17. Last modified 2026-06-17.