Hack This Site: Basic Mission 7

Click here: LEVEL 7

I remember that here I write SPOILERS!
I RECOMMEND to win the level alone, using also Google for Theory of arguments

 "The password is hidden in an unknown file, and Sam has set up a script to display a calendar. Requirements: Basic UNIX command knowledge."

Uhm...

Here we must know basic UNIX commands

The text says that Sam has set up a script that returns the output from the UNIX cal command... Here there may be a vulnerability... The text says also that the file containing the password, is saved in a directory... SO WE MUST ACCESS TO DIRECTORY

To do it, we type, into the script of cal, this

;ls

This command shows all files into directory where we are.
We note that there is a file called "k1kh31b1n55h.php". So type on url bar:

https://www.hackthissite.org/missions/basic/7/k1kh31b1n55h.php

===============> HTS: Basic Mission 8