Authorization using social networks?

Question

User identification

What information is accessed by the site on which you log in using your mail accounts or social networks? How safe is it overall?

Answer 1

Looking through what social. network to log in, but in general, mainly, by default, access only to basic (general information) ala name, surname, date of birth, gender, city, etc. This is so secure that when you try to log in through some application, you will be listed what permissions the resource you are logging into is trying to get. If there is a standard form with access to general information, then there is nothing to be afraid of, but if there is a rich set of permissions as in the photo, which are not clear why this resource is needed, then you should be wary