No boundaries for Facebook data: third-party trackers abuse Facebook Login

So far in the No boundaries series, we’ve uncovered how web trackers exfiltrate identifying information from web pages, browser password managers, and form inputs .

Today we report yet another type of surreptitious data collection by third-party scripts that we discovered: the exfiltration of personal identifiers from websites through “login with Facebook” and other such social login APIs.

Source: No boundaries for Facebook data: third-party trackers abuse Facebook Login