CVE-2025-54411
Discourse welcome banner user name XSS
Vexday Risk Score
8Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 2.4EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
19 Aug 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
discourse · discourseWant to know if your infrastructure is exposed to this?
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