Medium severity6.1GHSA Advisory· Published May 7, 2026· Updated May 7, 2026
CVE-2026-41661
CVE-2026-41661
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
admidio/admidioPackagist | < 5.0.9 | 5.0.9 |
Affected products
2Patches
Vulnerability mechanics
References
4News mentions
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