CVE-2016-11071: Mattermost Server

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in Mattermost Server before 3.1.0. It allows XSS because the noreferrer and noopener protection mechanisms were not in place.

Affected products

• Mattermost Mattermost Server: before 3.1.0 (fixed in 3.1.0)

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