CVE-2022-1002: Mattermost

Medium severity, CVSS 5.4. EPSS: 0.7% chance of exploitation in the next 30 days.

Mattermost 6.3.0 and earlier fails to properly sanitize the HTML content in the email invitation sent to guest users, which allows registered users with special permissions to invite guest users to inject unescaped HTML content in the email invitations.

Affected products

• Mattermost Mattermost: before 6.4.0 (fixed in 6.4.0)

Published 2022-03-18. Last modified 2026-06-17.