CVE-2026-47233 Admidio: Any logged-in user can delete inventory fields via `mode=field_delete` — incomplete fix of #2024

Admidio is an open-source user management solution. Version 5.0.9 added a missing isAdministratorInventory gate to case 'itemdelete': in modules/inventory.php. The same fix was not applied to the sibling case 'fielddelete': handler, which destroys an entire inventory field definition, cascading t...