CVE-2020-20389

Name: CVE-2020-20389
Creator: NVD / NIST
Published: 2021-06-23T15:15:08.44+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.59%

Last modified Jun 17, 2026

CVE-2020-20389 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. Cross Site Scripting (XSS) vulnerability in GetSimpleCMS 3.4.0a in admin/edit.php.. EPSS estimates a 0.59% chance of exploitation in the next 30 days.

Description

Cross Site Scripting (XSS) vulnerability in GetSimpleCMS 3.4.0a in admin/edit.php.

Metrics

CVSS 3.1

4.8/10

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

EPSS Probability

0.59%

43.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions	Update
Get-Simple	Getsimplecms	3.4.0	A1

References

https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1321Exploit, Third Party Advisory
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1321Exploit, Third Party Advisory

Timeline

Published: Jun 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-20389?

Cross Site Scripting (XSS) vulnerability in GetSimpleCMS 3.4.0a in admin/edit.php.

How severe is CVE-2020-20389?

CVE-2020-20389 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.

How do I fix CVE-2020-20389?

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-2020-20389?

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

Scan your code now

Source: NVD / NIST