Admidio is an open-source user management solution. In versions 5.0.0 through 5.0.6, the documents and files module does not verify whether the current user has permission to delete folders or files. The folder_delete and file_delete action handlers in modules/documents-files.php only perform a VIEW authorization check (getFolderForDownload / getFileForDownload) before calling delete(), and they never validate a CSRF token. Because the target UUIDs are read from $_GET, deletion can be triggered by a plain HTTP GET request. When the module is in public mode (documents_files_module_enabled = 1) and a folder is marked public (fol_public = true), an unauthenticated attacker can permanently destroy the entire document library. Even when the module requires login, any user with view-only access can delete content they are only permitted to read. This issue has been fixed in version 5.0.7.

Affected: Packagist: admidio/admidio

## Summary

The documents and files module in Admidio does not verify whether the current user has permission to delete folders or files. The `folder_delete` and `file_delete` action handlers in `modules/documents-files.php` only perform a VIEW authorization check (`getFolderForDownload` / `getFileForDownload`) before calling `delete()`, and they never validate a CSRF token. Because the target UUIDs are read from `$_GET`, deletion can be triggered by a plain HTTP GET request. When the module is in public mode (`documents_files_module_enabled = 1`) and a folder is marked public (`fol_public = true`), an unauthenticated attacker can permanently destroy the entire document library. Even when the module requires login, any user with view-only access can delete content they are only permitted to read.

## Details

### Module Access Check

File: `D:/bugcrowd/admidio/repo/modules/documents-files.php`, lines 72-76

The module only blocks unauthenticated access when the setting is 2 (members-only). When the setting is 1 (public), no login is required to reach any action handler:

```php if ($gSettingsManager->getInt('documents_files_module_enabled') === 0) { throw new Exception('SYS_MODULE_DISABLED'); } elseif ($gSettingsManager->getInt('documents_files_module_enabled') === 2 && !$gValidLogin) { throw new Exception('SYS_NO_RIGHTS'); } ```

### Vulnerable Code Path 1: Folder Deletion

File: `D:/bugcrowd/admidio/repo/modules/documents-files.php`, lines 122-133

```php case 'fol…