CVE-2022-39270: Discourse Discotoc

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

DiscoTOC is a Discourse theme component that generates a table of contents for topics. Users that can create topics in TOC-enabled categories (and have sufficient trust level - configured in component's settings) are able to inject arbitrary HTML on that topic's page. The issue has been fixed on the `main` branch. Admins can update the theme component through the admin UI (Customize -> Themes -> Components -> DiscoTOC -> Check for Updates). Alternatively, admins can temporarily disable the DiscoTOC theme component.

Affected products

• Discourse Discotoc: before 2.1.0 (fixed in 2.1.0)

Published 2022-10-06. Last modified 2026-06-17.