CVE-2024-47003: Mattermost Server

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Mattermost versions 9.11.x <= 9.11.0 and 9.5.x <= 9.5.8 fail to validate that the message of the permalink post is a string, which allows an attacker to send a non-string value as the message of a permalink post and crash the frontend.

Affected products

• Mattermost Mattermost Server: from 9.5.0, before 9.5.9 (fixed in 9.5.9); version 9.11.0 only

Published 2024-09-26. Last modified 2026-06-17.