XSS in Discourse Discourse-Mermaid-Theme-Component
CVE-2022-46180
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Discourse Discourse-Mermaid-Theme-Component — versions = 1.0.0
- Discourse Mermaid
Weakness classification (CWE)
References
- github.com/discourse/discourse-mermaid-theme-component/security/advisories/GHSA… (Third Party Advisory)
- github.com/discourse/discourse-mermaid-theme-component/pull/14 (Patch, Third Party Advisory)
- github.com/discourse/discourse-mermaid-theme-component/commit/c10bc4a08bf865cee… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-46180?
- CVE-2022-46180 is a medium-severity vulnerability in Discourse Discourse-Mermaid-Theme-Component, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 5.0/10. Published 2023-01-04.
- How severe is CVE-2022-46180?
- Medium severity. CVSS v3 base score is 5.0 out of 10.