CVE-2026-33395

Published March 19th, 2026

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CVSS v3

4.4

MEDIUM

CVSS v2

N/A

Affected

PROJECT

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.

discourse/discourse

A platform for community discussion. Free, open, simple.

GitHub

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