[https://infosec.rm-it.de/2018/02/27/neverlan-ctf-2018-json-parsing-1/](https://infosec.rm-it.de/2018/02/27/neverlan-ctf-2018-json-parsing-1/)

Original writeup (https://infosec.rm-it.de/2018/02/27/neverlan-ctf-2018-json-parsing-1/).