CVE-2024-54083: Mattermost Server

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

Mattermost versions 10.1.x <= 10.1.2, 10.0.x <= 10.0.2, 9.11.x <= 9.11.4, 9.5.x <= 9.5.12 fail to properly validate the type of callProps which allows a user to cause a client side (webapp and mobile) DoS to users of particular channels, by sending a specially crafted post.

Affected products

• Mattermost Mattermost Server: from 9.5.0, before 9.5.13 (fixed in 9.5.13); from 9.11.0, before 9.11.5 (fixed in 9.11.5); from 10.0.0, before 10.0.3 (fixed in 10.0.3); from 10.1.0, before 10.1.3 (fixed in 10.1.3)

Published 2024-12-16. Last modified 2026-06-17.