{"id":"CVE-2025-54411","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-54411","generatedAt":"2026-10-28T00:25:22.630Z","title":"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.","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\nany users for the time being. This vulnerability is fixed in 3.5.0.beta8.","published":"2025-08-19T17:15:41.000Z","lastModified":"2026-06-17T09:40:03.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":2.4,"severity":"LOW","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-79"],"affected":["discourse/discourse"],"epss":{"score":0.00205,"percentile":0.10408,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/discourse/discourse/commit/a3374d2850f07444d113216e1d539ee21650dbff","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-5mm6-j5vq-6884","tags":["Mitigation","Third Party Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-54411","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}