Hello all =D , Hope you are doing well
Today we will see that how we can Abuse Windows Opener function to bypass certain restriction in web application.
So first lets see what is Windows Opener Function
According To Mozilla Developer Guide
When a window is opened from another window, it maintains a reference to that first window aswindow.opener. If the current window has no opener, this method returns NULL. Windows Phone browser does not support window.opener. It is also not supported in IE if the opener is in a different security zone.