CVE-2017-18352 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in rendertron. 1 public exploit reference exists, so weaponization risk is real. A fix is available for rendertron — see the affected versions and patch details below.
rendertron XSS vulnerability
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2017-18352 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
rendertronnpmDescription
Error reporting within Rendertron 1.0.0 allows reflected Cross Site Scripting (XSS) from invalid URLs.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | rendertron | all versions | 1.1.0npm install rendertron@1.1.0 |
Affected Products
rendertrongoogleResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for rendertron, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update rendertron to 1.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-18352 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
Frequently Asked Questions
Is CVE-2017-18352 in your dependencies?
Find it across npm, including transitive dependencies.