Yahoo Reveals 32 Million Accounts Were Hacked Using 'Cookie Forging Attack'

Yahoo accused that about 32 million user accounts were accessed by hackers in the last two years using  cookie forging attack ( sophisticated )without any password.


These compromised accounts are in addition to the Yahoo accounts affected by the two massive data breaches that the company disclosed in last few months.

"Based on the investigation, we believe an unauthorized third party accessed the company's proprietary code to learn how to forge certain cookies," Yahoo said in its annual report filed with the US Securities and Exchange Commission (SEC).

Forged cookies" are some kind of keys that allows the user to access his account without re-entering his password.