admidio up to 5.0.8 members_assignment_data.php BIRTHDAY/STREET/CITY/POSTCODE/COUNTRY information disclosure

Summaryinfo

A vulnerability was found in admidio up to 5.0.8. It has been classified as problematic. Impacted is an unknown function of the file members_assignment_data.php. The manipulation of the argument BIRTHDAY/STREET/CITY/POSTCODE/COUNTRY leads to information disclosure. This vulnerability is documented as CVE-2026-41659. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in admidio up to 5.0.8 and classified as problematic. This issue affects an unknown code block of the file members_assignment_data.php. The manipulation of the argument BIRTHDAY/STREET/CITY/POSTCODE/COUNTRY with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

Admidio is an open-source user management solution. Prior to version 5.0.9, the member assignment DataTables endpoint (members_assignment_data.php) includes hidden profile fields (BIRTHDAY, STREET, CITY, POSTCODE, COUNTRY) in its SQL search condition regardless of field visibility settings. While the JSON output correctly suppresses hidden columns via isVisible() checks, the server-side search operates at the SQL level before any visibility filtering. This allows a role leader with assign-only permissions to infer hidden PII values by observing which users appear in search results for specific values. This issue has been patched in version 5.0.9.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-41659 since 04/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation needs additional levels of successful authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

By approaching the search of inurl:members_assignment_data.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 5.0.9 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Name

• admidio

Version

• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6
• 5.0.7
• 5.0.8

Website

• Product: https://github.com/Admidio/admidio/

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