CVE-2021-36601: Get-Simple Getsimplecms

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

GetSimpleCMS 3.3.16 contains a cross-site Scripting (XSS) vulnerability, where Function TSL does not filter check settings.php Website URL: "siteURL" parameter.

Affected products

• Get-Simple Getsimplecms: version 3.3.16 only

Published 2021-08-10. Last modified 2026-06-17.