EpicEditor XSS VulnerabilityGHSA-4wc5-gfgh-4vjx
MEDIUMGHSA-4wc5-gfgh-4vjx is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in epiceditor. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
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.
epiceditornpmDescription
EpicEditor through 0.2.3 has Cross-Site Scripting because of an insecure default marked.js configuration. An example attack vector is a crafted IMG element in an HTML document.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | epiceditor | all versions | No fix |
Affected Products
epiceditorepiceditor_projectResearch 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 epiceditor, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of epiceditor for GHSA-4wc5-gfgh-4vjx. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
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 GHSA-4wc5-gfgh-4vjx in your dependencies?
Find it across npm, including transitive dependencies.