Background : Recently quora got breached and database were reported to be stolen, Myself used to have a habit of signing in through google login.

Problem statement : What were the possible impacts when i sign in through google authentication during database breach, In general whenever username and password is breached common implications will apply.But in the above case what can a black hat or bad guy can probably do.

Possible scene/Impact :

* Hacker can sign in using my oauth token ,but it requires valid session
* Hacker can obtain my info through some api if website uses it.

What were the worst case will happen on above scenario,i.e when a database breach happens with third party authentication [google/openid,etc].Or we no need to worry at all?

marked as duplicate by schroeder Dec 5 '18 at 13:33

This question was marked as an exact duplicate of an existing question.