2026-02-06 15:52:31
Mattermost
PUBLISHED
Mattermost Confluence plugin version <1.7.0 fails to properly escape user-controlled display names in HTML template rendering which allows authenticated Confluence users with malicious display names to execute arbitrary JavaScript in victim browsers via sending a specially crafted OAuth2 connection link that, when visited, renders the attackers display name without proper sanitization. Mattermost Advisory ID: MMSA-2025-00557