CVE-2024-47401: Mattermost Server

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Mattermost versions 9.10.x <= 9.10.2, 9.11.x <= 9.11.1 and 9.5.x <= 9.5.9 fail to prevent detailed error messages from being displayed in Playbooks which allows an attacker to generate a large response and cause an amplified GraphQL response which in turn could cause the application to crash by sending a specially crafted request to Playbooks.

Affected products

• Mattermost Mattermost Server: from 9.5.0, before 9.5.10 (fixed in 9.5.10); from 9.10.0, before 9.10.3 (fixed in 9.10.3); from 9.11.0, before 9.11.2 (fixed in 9.11.2)

Published 2024-10-29. Last modified 2026-06-17.