Unrated severityNVD Advisory· Published Mar 19, 2026· Updated Mar 20, 2026
Discourse has stored click‑based XSS via Graphviz SVG javascript: links
CVE-2026-33395
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- Range: >= 2026.1.0-latest, < 2026.1.2
Patches
Vulnerability mechanics
References
4- github.com/discourse/discourse/commit/0471e68ed0b594bf386e068f228849244b880ef1mitrex_refsource_MISC
- github.com/discourse/discourse/commit/0c861df8bea03dcc01b60da6cc7038e6c88de4eemitrex_refsource_MISC
- github.com/discourse/discourse/commit/472f9e1f7855307e489e9eaa6825d5335dfc08b5mitrex_refsource_MISC
- github.com/discourse/discourse/security/advisories/GHSA-23c7-gq89-xm5vmitrex_refsource_CONFIRM
News mentions
0No linked articles in our index yet.