CVE-2025-54411 Information

Aug 20, 2025 cve

Description

Discourse is an open-source discussion platform. Welcome banner user name string for logged in users can be vulnerable to XSS attacks which affect the user themselves or an admin impersonating them. Admins can temporarily alter the welcome_banner.header.logged_in_members site text to remove the preferred_display_name placeholder or not impersonate any users for the time being. This vulnerability is fixed in 3.5.0.beta8.

Reference

https://github.com/discourse/discourse/commit/a3374d2850f07444d113216e1d539ee21650dbff https://github.com/discourse/discourse/security/advisories/GHSA-5mm6-j5vq-6884

CNNVD-202508-2182 (Published: 2025-08-19)

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