CVE-2023-5339: Mattermost Desktop

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

Mattermost Desktop fails to set an appropriate log level during initial run after fresh installation resulting in logging all keystrokes including password entry being logged. 

Affected products

• Mattermost Mattermost Desktop: up to and including 5.4.0

Published 2023-10-17. Last modified 2026-06-17.