CVE-2023-5968: Mattermost

Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days.

Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body. 

Affected products

• Mattermost Mattermost: up to and including 7.8.11; from 8.0.0, up to and including 8.0.3; from 8.1.0, up to and including 8.1.2; version 9.0.0 only

Published 2023-11-06. Last modified 2026-06-17.