CVE-2020-18658: Get-Simple Getsimplecms

Medium severity, CVSS 6.1. EPSS: 1.4% chance of exploitation in the next 30 days.

Cross Site Scriptiong (XSS) vulnerability in GetSimpleCMS <=3.3.15 via the timezone parameter to settings.php.

Affected products

• Get-Simple Getsimplecms: up to and including 3.3.15

Published 2021-06-23. Last modified 2026-06-17.