CVE-2020-14450: Mattermost Server

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

An issue was discovered in Mattermost Server before 5.22.0. The markdown renderer allows attackers to cause a denial of service (client-side), aka MMSA-2020-0017.

Affected products

• Mattermost Mattermost Server: before 5.22.0 (fixed in 5.22.0)

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