Don’t go to the wayback machine and search for http://cache.htb
It will not end well for your eyes (or maybe it will I dunno what stuff you 're into).
Someone is also destroying the whole functionality. Please be more gentle, it requires brain not brawl. I have to reset again due to this mess.
HINT: For the initial foothold you don’t need OSINT but that author is telling you something interesting.
ANOTHER HINT: If you found the vulnerability do not change the globals file, it breaks our experience. Modify the POC you found on the internetz accordingly.