What’s Vulnerable › Vulnerabilities
CVE-2023-2281: Archiving a team broadcasts unsanitized data over WebSockets
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-04-25 · updated 2026-06-17
- Weakness: CWE-200
Description
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: before 7.9.0 — fixed in 7.9.0
How to fix
Upgrade to a fixed version: Mattermost 7.9.0. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2023-2281 or the next vulnerability affects your stack