CVE-2020-23839: Get-Simple Getsimple CMS

Medium severity, CVSS 6.1. EPSS: 10.5% chance of exploitation in the next 30 days.

A Reflected Cross-Site Scripting (XSS) vulnerability in GetSimple CMS v3.3.16, in the admin/index.php login portal webpage, allows remote attackers to execute JavaScript code in the client's browser and harvest login credentials after a client clicks a link, enters credentials, and submits the login form.

Affected products

• Get-Simple Getsimple CMS: version 3.3.16 only

Published 2020-09-01. Last modified 2026-06-17.