[https://rawsec.ml/en/EasyCTF-2018-write-ups/#80-nosource-jr-web](https://rawsec.ml/en/EasyCTF-2018-write-ups/#80-nosource-jr-web)

Original writeup (https://rawsec.ml/en/EasyCTF-2018-write-ups/#80-nosource-jr-web).