CVE-2021-43810: Admidio

Medium severity, CVSS 6.1. EPSS: 5.1% chance of exploitation in the next 30 days.

Admidio is a free open source user management system for websites of organizations and groups. A cross-site scripting vulnerability is present in Admidio prior to version 4.0.12. The Reflected XSS vulnerability occurs because redirect.php does not properly validate the value of the url parameter. Through this vulnerability, an attacker is capable to execute malicious scripts. This issue is patched in version 4.0.12.

Affected products

• Admidio Admidio: before 4.0.12 (fixed in 4.0.12)

Published 2021-12-07. Last modified 2026-06-17.