CVE-2026-33395 (GCVE-0-2026-33395)
Vulnerability from cvelistv5
Published
2026-03-19 22:33
Modified
2026-03-20 16:40
Severity ?
4.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the discourse-graphviz plugin contains a stored cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious JavaScript code through DOT graph definitions. For instances with CSP disabled only. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, disable the graphviz plugin, upgrade to a patched version, or enable a content security policy.
References
Impacted products
Vendor Product Version
discourse discourse Version: >= 2026.1.0-latest, < 2026.1.2
Version: >= 2026.2.0-latest, < 2026.2.1
Version: = 2026.3.0-latest
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