CVE-2020-21643

Name: CVE-2020-21643
Creator: NVD / NIST
Published: 2023-04-28T20:15:13.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2020-21643 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Cross Site Scripting (XSS) vulnerability in HongCMS 3.0 allows attackers to run arbitrary code via the callback parameter to /ajax/myshop.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

Cross Site Scripting (XSS) vulnerability in HongCMS 3.0 allows attackers to run arbitrary code via the callback parameter to /ajax/myshop.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.41%

32.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Hongcms Project	Hongcms	3.0.0

References

https://github.com/Neeke/HongCMS/issues/15Exploit, Issue Tracking
https://github.com/Neeke/HongCMS/issues/15Exploit, Issue Tracking

Timeline

Published: Apr 28, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21643?

Cross Site Scripting (XSS) vulnerability in HongCMS 3.0 allows attackers to run arbitrary code via the callback parameter to /ajax/myshop.

How severe is CVE-2020-21643?

CVE-2020-21643 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21643?

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-2020-21643?

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

Scan your code now

Source: NVD / NIST