Whatsapp vulnerable to Account Takeover

Whatsapp vulnerable to Account Takeover
https://web.whatsapp.com/pp?t=l&u=91<10DigitNumber>%40c.us&i=<10DigitSecurePIN>
you can view anyones pp, am sure very soon u'ld be able to view someones conversations.
https://web.whatsapp.com
https://w1.web.whatsapp.com/
https://w2.web.whatsapp.com/
https://w3.web.whatsapp.com/
https://w4.web.whatsapp.com/
https://w5.web.whatsapp.com/
https://w6.web.whatsapp.com/
https://w7.web.whatsapp.com/
https://w8.web.whatsapp.com/
https://w9.web.whatsapp.com/
https://w10.web.whatsapp.com