Vulnerability Details CVE-2026-33411
Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a potential stored XSS in topic titles for the solved posts stream. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, ensure that the Content Security Policy is enabled, and has not been modified in a way which would make it more vulnerable to XSS attacks.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 8.0%
CVSS Severity
CVSS v3 Score 5.4