A few lines of code are all that are required to remove the location protection that you get from using a VPN, and find out where you really are and who your ISP really is (who can then bind your address to who you are particular.) Although the vulnerability depends primarily on the browser, any application that can display web pages (and uses WebRTC) is affected, which means that anyone who wants to see a past VPN is where you really are. and who you really are. Advertisers, data brokers and governments can use it to peek through your VPN to see where your connection is coming from. If you use services such as BitTorrent, have a prefix such as Roku, or just play music or movies on your computer through a site that is not available in your country (or you are an emigrant and live abroad), applications and Services, which you use may suddenly stop working.