WidzialniCMS is vulnerable to Unrestricted File Upload in the /panel/controllers/save_photo.php endpoint. Due to a client-controlled permission check parameter and insufficient validation of the currentpath parameter, an unauthenticated attacker can upload arbitrary files to any locations on the server, leading to Remote Code Execution.
This issue has been fixed in version 2.5.
Unrestricted Upload of File with Dangerous Type The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.