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Not in CISA KEV
MEDIUM severity

CVE-2018-19056 — editor.md

MEDIUM

CVE-2018-19056 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.

Pandao editor.md vulnerable to DOM XSS

Also known asGHSA-x3g3-334f-q6h4
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 30, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs56th percentile — riskier than 56% of all scored CVEsHighest risk
0.00%0.43%0.86%1.29%0.2%0.8%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
665downloads / week

Description

pandao Editor.md 1.5.0 has DOM XSS via input starting with a "<<" substring, which is mishandled during construction of an A element.

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.

pandao Editor.md 1.5.0 has DOM XSS via input starting with a "<<" substr…

github.comNVDDec 2018

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-2018-19056. 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

pandao Editor.md 1.5.0 has DOM XSS via input starting with a "<<" substring, which is mishandled during construction of an A element.
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CVE-2018-19056: editor.md XSS (Medium 6.1)