A small quest on WEB 2.0

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

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

The minimum is to get a part of the source code of the server part of the application.
Maximum - to achieve the execution of its code on the server side.
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The task is not typical and rather difficult. Successes in passing!

Note: the server is weak, so the use of automated tools is not recommended. Moreover, automation will not help solving a task :)

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