admidio up to 5.0.7 Documents adm_my_files/.htaccess access control

Summaryinfo

A vulnerability was found in admidio up to 5.0.7. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file adm_my_files/.htaccess of the component Documents Module. The manipulation results in access control. This vulnerability is identified as CVE-2026-34381. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in admidio up to 5.0.7. Affected is some unknown processing of the file adm_my_files/.htaccess of the component Documents Module. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality. CVE summarizes:

Admidio is an open-source user management solution. From version 5.0.0 to before version 5.0.8, Admidio relies on adm_my_files/.htaccess to deny direct HTTP access to uploaded documents. The Docker image ships with AllowOverride None in the Apache configuration, which causes Apache to silently ignore all .htaccess files. As a result, any file uploaded to the documents module regardless of the role-based permissions configured in the UI, is directly accessible over HTTP without authentication by anyone who knows the file path. The file path is disclosed in the upload response JSON. This issue has been patched in version 5.0.8.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-34381 since 03/27/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 5.0.8 eliminates this vulnerability. Applying the patch 5f770c1ca81a4f6b02136280cd63316a35aabaaf is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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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

License

• open-source

Website

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

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