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MEDIUM severity

CVE-2019-9737 — editor.md

MEDIUM

CVE-2019-9737 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in editor.md. 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.

Cross-Site Scripting in editor.md

Also known asGHSA-2j5v-fc74-j9q2
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs58th percentile — riskier than 58% of all scored CVEsHighest risk
0.00%0.45%0.90%1.36%0.2%0.9%Apr 26Aug 26Oct 26

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

1 pkg affected

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.

6other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
editor.mdnpm
571downloads / week

Description

All versions of editor.md are vulnerable to Cross-Site Scripting. User input is insufficiently sanitized, allowing attackers to inject malicious code in payloads containing base64-encoded content.

Recommendation

No fix is currently available. Consider using an alternative module until a fix is made available.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
📦npmeditor.mdall versionsNo fix

Affected Products

1 product · 1 configurations
Application
editor.mdipandao
1 version
1.5.0
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Editor.md 1.5.0 has DOM-based XSS via vectors involving the '<EMBED SRC=…

github.comNVDJan 2020

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for editor.md, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of editor.md for CVE-2019-9737. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. 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

All versions of `editor.md` are vulnerable to Cross-Site Scripting. User input is insufficiently sanitized, allowing attackers to inject malicious code in payloads containing base64-encoded content. ## Recommendation No fix is currently available. Consider using an alternative module until a fix is made available.
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CVE-2019-9737: editor.md: Cross-Site Scripting