CVE-2026-33411 — Discourse's solved topic stream has potential stored XSS in topic title

CVE-2026-33411

Discourse's solved topic stream has potential stored XSS in topic title PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
discourse / discourse	affected >= 2026.1.0-latest, < 2026.1.2; affected >= 2026.2.0-latest, < 2026.2.1; affected = 2026.3.0-latest

CWE

CWE-79

References

https://github.com/discourse/discourse/security/advisories/GHSA-j3mm-ghh2-83x2

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.