Service overview and write up: https://gist.github.com/PaulCher/502b1fd2642b738f004c975dc8720e74

Exploit: https://gist.github.com/PaulCher/22ddbe3e238fefced460f7d136b7e24c

Original writeup (https://gist.github.com/PaulCher/502b1fd2642b738f004c975dc8720e74).