A few days back Yahoo send e-mail to its account holder that they should change their passwords as the information could be stolen or hacked by outsiders. Once again Yahoo has started alarming their e-mail users for another threat. This is not for hacker’s previous hacking criteria but the recent activities that has started developing in.
The current way of hackers to hack account is somewhat complicated. Apart from using malware to access the password of Yahoo user, they have now hit the security system and cookies that tell that user is already logged in. This way hacker can easily access their accounts without passwords.
However, this is unknown since when hackers are into this practice, but Yahoo e-mails suggest it started in 2015.