CVE-2019-20860: Mattermost Server

Medium severity, CVSS 5.5. EPSS: 0.9% chance of exploitation in the next 30 days.

An issue was discovered in Mattermost Server before 5.14.0, 5.13.3, 5.12.6, and 5.9.4. It allows remote attackers to cause a denial of service (application hang) via a crafted SVG document.

Affected products

• Mattermost Mattermost Server: before 5.9.4 (fixed in 5.9.4); from 5.12.0, before 5.12.6 (fixed in 5.12.6); from 5.13.0, before 5.13.3 (fixed in 5.13.3); version 5.14.0 only

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