CVE-2021-4172

Name: CVE-2021-4172
Creator: NVD / NIST
Published: 2022-01-22T12:15:07.623+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.64%

Last modified Jun 17, 2026

CVE-2021-4172 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Cross-site Scripting (XSS) - Stored in GitHub repository star7th/showdoc prior to 2.10.2.. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

Description

Cross-site Scripting (XSS) - Stored in GitHub repository star7th/showdoc prior to 2.10.2.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.64%

46.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Showdoc	Showdoc	< 2.10.2

References

https://github.com/star7th/showdoc/commit/409c8a1208bbb847046a9496303192980f2e6219Patch, Third Party Advisory
https://huntr.dev/bounties/c041b693-877b-4456-b463-19e4c9456eeeExploit, Patch, Third Party Advisory
https://github.com/star7th/showdoc/commit/409c8a1208bbb847046a9496303192980f2e6219Patch, Third Party Advisory
https://huntr.dev/bounties/c041b693-877b-4456-b463-19e4c9456eeeExploit, Patch, Third Party Advisory

Timeline

Published: Jan 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4172?

Cross-site Scripting (XSS) - Stored in GitHub repository star7th/showdoc prior to 2.10.2.

How severe is CVE-2021-4172?

CVE-2021-4172 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4172?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4172?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST