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MEDIUM severity

CVE-2022-38639 — markdown-nice

MEDIUM

CVE-2022-38639 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in markdown-nice. 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.

Markdown-Nice v1.8.22 vulnerable to Cross-site Scripting

Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk+0.01%
Lower risk than most CVEs44th percentile — riskier than 44% of all scored CVEsHighest risk
0.00%0.34%0.67%1.01%0.2%0.5%May 26Sep 26Nov 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.

0other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
markdown-nicenpm
52downloads / week

Description

A cross-site scripting (XSS) vulnerability in Markdown-Nice v1.8.22 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Community Posting field.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
📦npmmarkdown-niceall versionsNo fix

Affected Products

1 product · 1 configurations
Application
markdown niceinkdrop
1 version
1.8.22
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.

A cross-site scripting (XSS) vulnerability in Markdown-Nice v1.8.22 allo…

github.comNVDSep 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for markdown-nice, 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 markdown-nice for CVE-2022-38639. 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

A cross-site scripting (XSS) vulnerability in Markdown-Nice v1.8.22 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Community Posting field.
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CVE-2022-38639: markdown-nice XSS (Medium 5.4)