This is third part of h4x0rs.club challenge series.
With the original version, you have to achieve XSS then make admin send exploit payload into backend.
I release it again at 0ctf finals round since no one solved it, strip out the XSS part.
You can find solution inside the slide
Binary and php's bridge can be downloaded in this folder.
Live at: http://206.189.235.246/intro.txt
I will upload my exploit code soon. meanwhile, let's enjoy it.