Jan. 4, 2023, 5:15 p.m. |

National Vulnerability Database web.nvd.nist.gov

Discourse Mermaid (discourse-mermaid-theme-component) allows users of Discourse, open-source forum software, to create graphs using the Mermaid syntax. Users of discourse-mermaid-theme-component version 1.0.0 who can create posts are able to inject arbitrary HTML on that post. The issue has been fixed on the `main` branch of the GitHub repository, with 1.1.0 named as a patched version. Admins can update the theme component through the admin UI. As a workaround, admins can temporarily disable discourse-mermaid-theme-component.

1.0.0 1.1.0 cve discourse forum github graphs html inject issue main mermaid repository software theme update version version 1 workaround

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