Vulnerability On Facebook Password

Sow Ching Shiong, an independent vulnerability researcher has discovered a Password Reset vulnerability in www.facebook.com, which can be exploited by an attacker to bypass certain security restrictions.

In normal circumstances, an authenticated Facebook user is required to enter his/her current password on the change password page to prevent an unauthorized person from changing the password without the user's knowledge.
However, an attacker can change/reset a user's password without knowing the user's current password by accessing this URL directly:

https://www.facebook.com/hacked.

After that, the page will be redirected to https://www.facebook.com/checkpoint/checkpointme?f=[userid]&r=web_hacked

Now, the attacker can click "Continue" to change/reset the user's password.

Proof of concept

Step 1: Logon to Facebook and access this URL directly: https://www.facebook.com/hacked. The page will be redirected to https://www.facebook.com/checkpoint/checkpointme?f=[userid]&r=web_hacked

Step 2: Click on "Continue" to proceed

Step 3: Enter "New Password" and "Confirm Password" to change/reset the password.

Conclusion
This vulnerability has been confirmed and patched by Facebook Security Team. I would like to thank them for their quick response to my report.

Note: This tutorial is only for Educational Purposes, I did not take any responsibility of any misuse, you will be solely responsible for any misuse that you do. Hacking email accounts is criminal activity and is punishable under cyber crime and you may get upto 40 years of imprisonment, if got caught in doing so.