This box appears to be looking for just the user.txt file as well as the root.txt file. It doesnt give too much info beyond that
“A new start-up has a few issues with their web server.”
Only port open is 80. So lets go!
Looks like fuel CMS is running
Gobuster is showing a few directories here
Nothing noteworthy in those directories.
Going to research Fuel CMS version 1.4 from here
https://www.exploit-db.com/exploits/50477
Downloading and running that file we get this shell