**Official Writeup**
**tl;dr**
+ `Json_Interoperability` - /verify_roles?role=supersuperuseruser\ud800","name":"admin+ `Prototype_Pollution` - {"constructor":{"prototype":{"test":"123"}}} in config-handler+ `RCE` - using squirrelly-js
Link to the writeup: https://blog.bi0s.in/2021/08/15/Web/inCTFi21-JsonAnalyser/
Author: [Sayooj](https://twitter.com/_1nt3rc3pt0r_)