A small quest on the theme of WEB 2.0

We offer you an interesting two-level quest on the topic of information security in the field of WEB 2.0 technologies.

Server: http://46.4.187.243:8080/
Task:

Minimum - get a part of the source code of the server part of the application.
The maximum is to get your code to run on the server side.

The task is not typical and rather complicated. Success in passing!

Note: the server is weak, so using automated tools is not recommended. Moreover, automation will not help to solve the task :)

The author of the Qwazar task. Details on the link: http://qwazar.ru/?p=68