CVE-2026-33411

Description

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.

PUBLISHED Reserved 2026-03-19 | Published 2026-03-20 | Updated 2026-03-24 | Assigner GitHub_M

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

References

github.com/...course/security/advisories/GHSA-j3mm-ghh2-83x2

cve.org (CVE-2026-33411)

nvd.nist.gov (CVE-2026-33411)

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