CVE-2020-21656

Name: CVE-2020-21656
Creator: NVD / NIST
Published: 2021-10-06T22:15:07.983+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.44%

Last modified Jun 17, 2026

CVE-2020-21656 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. XYHCMS v3.6 contains a stored cross-site scripting (XSS) vulnerability in the component xyhai.php?s=/Link/index.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

XYHCMS v3.6 contains a stored cross-site scripting (XSS) vulnerability in the component xyhai.php?s=/Link/index.

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

0.44%

34.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Xyhcms	Xyhcms	3.6

References

https://github.com/gosea/xyhcms3/issues/2Exploit, Issue Tracking, Third Party Advisory
https://github.com/gosea/xyhcms3/issues/2Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Oct 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21656?

XYHCMS v3.6 contains a stored cross-site scripting (XSS) vulnerability in the component xyhai.php?s=/Link/index.

How severe is CVE-2020-21656?

CVE-2020-21656 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21656?

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-2020-21656?

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

Scan your code now

Source: NVD / NIST