The Ready_ application's Profile section allows users to upload files of any type and extension without restriction. If the server is misconfigured, as it was by default when installed at the turn of 2021 and 2022, it can result in Remote Code Execution. Refer to the Required Configuration for Exposure section for more information.
Impacted instances are those whose PHP files stored in public_html/apps/edokumenty/var can be executed.
This can be simply checked using the following temporary PHP file:
<? echo 'test';
If you see 'test' after navigating to that file in the browser, it means that this instance is misconfigured and allows for the execution of uploaded files.