CVE-2026-27154

Discourse contains an XSS flaw in which a user’s full name can be evaluated as raw HTML when display_name_on_posts is true and prioritize_username_in_ux is false. The issue occurs when editing a post by a malicious user, potentially triggering XSS. Affected versions include prior to 2025.12.2, 20...

CVE-2026-27154 Discourse has XSS when editing a malicious post

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: displaynameonposts = true; and prioritizeusernameinux = false. Editing a post of a malicious user would trigger ...

PT-2026-22194

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2025.12.2 Discourse versions prior to 2026.1.1 Discourse versions prior to 2026.2.0 Description Discourse, an open source discussion platform, contains a flaw where a user's full name can be interpreted as raw HTML...