CVE-2025-20051 Information

Description

Mattermost versions 10.4.x <= 10.4.1 9.11.x <= 9.11.7 10.3.x <= 10.3.2 10.2.x <= 10.2.2 fail to properly validate input when patching and duplicating a board which allows a user to read any arbitrary file on the system via duplicating a specially crafted block in Boards.

Reference

https://mattermost.com/security-updates