CVE-2024-39772: Mattermost Desktop

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Mattermost Desktop App versions <=5.8.0 fail to safeguard screen capture functionality which allows an attacker to silently capture high-quality screenshots via JavaScript APIs.

Affected products

• Mattermost Mattermost Desktop: before 5.9.0 (fixed in 5.9.0)

Published 2024-09-16. Last modified 2026-06-17.