(Edited on 06/04: in order to reflect the actual situation)
TL:DR: VPN leaks users’ IPs via WebRTC.
I’ve tested hundred VPN and Proxy providers and 19 of them leaks users’ IPs via WebRTC (16%)
You can check if your VPN leaks visiting: http://ip.voidsec.com
Here you can find the complete list of the VPN providers that I’ve tested: https://docs.google.com/spreadsheets/d/1Nm7mxfFvmdn-3Az-BtE5O0BIdbJiIAWUnkoAF_v_0ug/edit#gid=0
Add a comment or send me a tweet if you have updated results for any of the VPN which I am missing details. (especially...