Web proxies play a very crucial role for internet users today, from using it for anonymous surfing, bypassing restricted websites and whole lot of other user cases. However, the generic architecture in which web proxies are built over the years, pose several risks to the modern websites being proxied and used by the anonymous surfer. This talk is about subverting the security restrictions of the browser and websites, when an user is using any web proxy. We talk about how the browser's same origin policy is rendered completely ineffective, how cookies are completely owned, how a website's security mitigations are made futile. We also present a secure web proxy architecture that most of the modern day web proxies and web proxy frameworks should follow.