CVE-2022-39270 Arbitrary HTML injection in table-of-contents theme component in DiscoTOC
Users with sufficient trust levels can inject arbitrary HTML into topic pages via the DiscoTOC component, potentially leading to XSS attacks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2022-39270?
CVE-2022-39270 is a medium-severity cross-site scripting vulnerability in discourse DiscoTOC, published on 6 Oct 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2022-39270?
It affects 1 product.
Products include Discourse Discotoc.
How do I fix CVE-2022-39270?
No fix has been published for CVE-2022-39270 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2022-39270 being exploited?
There is no known exploitation of CVE-2022-39270 in the wild and no public exploit code.
Sources
Also known as GHSA-m44p-w923-w32h.