Facebook Bug Bounty:View Game Score,Achievements of any user.

In facebook a  user there is a feature in which a user can play games.Can make scores and unlock different kind of achievements.Only his/her friends can see his/her scores and achievements.But with GRAPH API non-friends were also able to view game scores and achievements of any users.



Steps to reproduce:

Graph API App's access token didn't worked so I used Facebook For Android App's Access Token.



Made  a GET request to https://graph.facebook.com/v2.10/10001133865325?fields=scores{application,score,user} endpoint.




In the above request 10001133865325 is my test account ID.
In response I got my test accounts game scores.(Not my friend on Facebook)




Again made a GET request to https://graph.facebook.com/v2.10/10001133865325?fields=achievements



Issuing a GET request to above endpoint I gor my test accounts Game Achievements in response.





Timeline: (GMT +0)

Reported: Sunday,June 11,2017 at 1:01am

Escalated:Wednesday,June 14,2017  at 7:32pm

Bounty Awarded:$500 on Wednesday,October 11,2017 at 7:29pm

Fixed:Thursday,October 19,2017 at 5:06pm

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