What is CVE-2022-38639?

CVE-2022-38639 is a medium-severity vulnerability in Inkdrop Markdown Nice, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-09-09.

How severe is CVE-2022-38639?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2022-38639 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Inkdrop Markdown Nice

CVE-2022-38639

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-09-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (40.4th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

Inkdrop Markdown Nice — versions 1.8.22

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

karimhabush/cyberowl

References

github.com/mdnice/markdown-nice/issues/327 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2022-38639?: CVE-2022-38639 is a medium-severity vulnerability in Inkdrop Markdown Nice, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-09-09.
How severe is CVE-2022-38639?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2022-38639 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.