CVE-2026-33395
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
4.4 / 10
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Vulnerability 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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-79
Source
NVD
Vendor
discourse
Product
discourse
External References
- https://github.com/discourse/discourse/commit/0471e68ed0b594bf386e068f228849244b880ef1
- https://github.com/discourse/discourse/commit/0c861df8bea03dcc01b60da6cc7038e6c88de4ee
- https://github.com/discourse/discourse/commit/472f9e1f7855307e489e9eaa6825d5335dfc08b5
- https://github.com/discourse/discourse/security/advisories/GHSA-23c7-gq89-xm5v
Discussion (0)
Add Comment
No comments yet. Be the first!