FACEBOOK OPEN-REDIRECTION VULNERABILITY WITH LINKSHIM HASH CAPTURING

For example, the url is something like this: 

https://facebook.com/l.php?u=https://example.com/ 
When one tries to visit the link, a redirection notice is issued by the browser which is notifying the user about the redirection. The redirection notice looks something like this. For example, the url is something like this: 

https://facebook.com/l.php?u=https://example.com/ 
When one tries to visit the link, a redirection notice is issued by the browser which is notifying the user about the redirection. The redirection notice looks something like this.