CVE-2026-33411 — Discourse's solved topic stream has potential stored XSS in topic title
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 str…
Published: 2026-03-20 · CVSS: 5.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7