CVE-2020-15159

Name: CVE-2020-15159
Creator: NVD / NIST
Published: 2020-08-28T22:15:10.657+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.6/10EPSS 2.15%

Last modified Jun 17, 2026

CVE-2020-15159 is a high-severity vulnerability rated 7.6/10 on the CVSS scale. baserCMS 4.3.6 and earlier is affected by Cross Site Scripting (XSS) and Remote Code Execution (RCE). This may be executed by logging in as a system administrator and uploading an executable script file such as a PHP file.The affected components are ThemeFilesController.php and UploaderFilesController.php. EPSS estimates a 2.15% chance of exploitation in the next 30 days.

Description

baserCMS 4.3.6 and earlier is affected by Cross Site Scripting (XSS) and Remote Code Execution (RCE). This may be executed by logging in as a system administrator and uploading an executable script file such as a PHP file.The affected components are ThemeFilesController.php and UploaderFilesController.php. This is fixed in version 4.3.7.

Metrics

CVSS 3.1

7.6/10

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

EPSS Probability

2.15%

79.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Basercms	Basercms	<= 4.3.6

References

https://basercms.net/security/20200827Vendor Advisory
https://github.com/baserproject/basercms/commit/16a7b3cd09a0ca355474119c76897eac2034a66dPatch, Third Party Advisory
https://github.com/baserproject/basercms/security/advisories/GHSA-673x-f5wx-fxpwPatch, Third Party Advisory
https://basercms.net/security/20200827Vendor Advisory
https://github.com/baserproject/basercms/commit/16a7b3cd09a0ca355474119c76897eac2034a66dPatch, Third Party Advisory
https://github.com/baserproject/basercms/security/advisories/GHSA-673x-f5wx-fxpwPatch, Third Party Advisory

Timeline

Published: Aug 28, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15159?

How severe is CVE-2020-15159?

CVE-2020-15159 has a CVSS score of 7.6/10 (HIGH severity). The EPSS model estimates a 2.15% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15159?

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-2020-15159?

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

Scan your code now

Source: NVD / NIST