admidio up to 5.0.6 forum.php topic_delete/post_delete authorization

Summaryinfo

A vulnerability has been found in admidio up to 5.0.6 and classified as problematic. The affected element is the function topic_delete/post_delete of the file forum.php. This manipulation causes authorization. This vulnerability is tracked as CVE-2026-32818. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in admidio up to 5.0.6. It has been declared as problematic. Affected by this vulnerability is the function topic_delete/post_delete of the file forum.php. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect integrity. The summary by CVE is:

Admidio is an open-source user management solution. In versions 5.0.0 through 5.0.6, the forum module in Admidio does not verify whether the current user has permission to delete forum topics or posts. Both the topic_delete and post_delete actions in forum.php only validate the CSRF token but perform no authorization check before calling delete(). Any authenticated user with forum access can delete any topic (with all its posts) or any individual post by providing its UUID. This is inconsistent with the save/edit operations, which properly check isAdministratorForum() and ownership before allowing modifications. Any logged-in user can permanently and irreversibly delete any forum topic (including all its posts) or any individual post by simply knowing its UUID (which is publicly visible in URLs), completely bypassing authorization checks. This issue has been fixed in version 5.0.7.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-32818 since 03/16/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit.

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

Upgrading to version 5.0.7 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

Website

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

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