Cloudanix VulnDB

CVE-2026-41661

Medium · 6.1

CVSS

6.1

EPSS

0.3%

Published

May 7, 2026

CISA due date

—

The record

Admidio is an open-source user management solution. Prior to version 5.0.9, an unauthenticated attacker can execute arbitrary JavaScript in any Admidio user's browser through a reflected XSS in system/msg_window.php. The endpoint passes user input through htmlspecialchars(), which does not encode square brackets. A subsequent call to Language::prepareTextPlaceholders() converts those brackets into HTML angle brackets, producing executable markup. This issue has been patched in version 5.0.9.

Affected packages

Ecosystem Package Introduced Fixed

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