XSS in Discourse Discotoc
CVE-2022-39270
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (39.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Discourse Discotoc — versions < 2.1.0
Weakness classification (CWE)
References
- github.com/discourse/DiscoTOC/security/advisories/GHSA-m44p-w923-w32h (Third Party Advisory)
- github.com/discourse/DiscoTOC/commit/f80c215a283cd045d2a371403e6eba88b2911192 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-39270?
- CVE-2022-39270 is a medium-severity vulnerability in Discourse Discotoc, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-10-06.
- How severe is CVE-2022-39270?
- Medium severity. CVSS v3 base score is 5.4 out of 10.