admidio up to 5.0.8 Add Mode documents-files.php Name path traversal

Summaryinfo

A vulnerability identified as critical has been detected in admidio up to 5.0.8. This impacts an unknown function of the file modules/documents-files.php of the component Add Mode. Performing a manipulation of the argument Name results in path traversal. This vulnerability is known as CVE-2026-41656. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in admidio up to 5.0.8. This affects some unknown functionality of the file modules/documents-files.php of the component Add Mode. The manipulation of the argument name with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. The summary by CVE is:

Admidio is an open-source user management solution. Prior to version 5.0.9, the add mode in modules/documents-files.php accepts a name parameter validated only as 'string' type (HTML encoding), allowing path traversal characters (../) to pass through unfiltered. Combined with the absence of CSRF protection on this endpoint and SameSite=Lax session cookies, a low-privileged attacker can trick a documents administrator into clicking a crafted link that registers an arbitrary server file (e.g., install/config.php containing database credentials) into a documents folder accessible to the attacker. This issue has been patched in version 5.0.9.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-41656 since 04/22/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation requires an enhanced level of successful authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

By approaching the search of inurl:modules/documents-files.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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