CVE-2023-2281: Mattermost Server

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

When archiving a team, Mattermost fails to sanitize the related Websocket event sent to currently connected clients. This allows the clients to see the name, display name, description, and other data about the archived team.

Affected products

• Mattermost Mattermost Server: before 7.9.0 (fixed in 7.9.0)

Published 2023-04-25. Last modified 2026-06-17.