CVE-2025-47700: Mattermost Server

Low severity, CVSS 3.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Mattermost Server versions 10.5.x <= 10.5.9 utilizing the Agents plugin fail to reject empty request bodies which allows users to trick users into clicking malicious links via post actions

Affected products

• Mattermost Mattermost Server: from 10.5.0, before 10.5.9 (fixed in 10.5.9)

Published 2025-08-21. Last modified 2026-06-17.