CVE-2019-20861: Mattermost Desktop

High severity, CVSS 8.8. EPSS: 1.7% chance of exploitation in the next 30 days.

An issue was discovered in Mattermost Desktop App before 4.2.2. It allows attackers to execute arbitrary code via a crafted link.

Affected products

• Mattermost Mattermost Desktop: before 4.2.2 (fixed in 4.2.2)

Published 2020-06-19. Last modified 2026-06-17.