Yahoo Mail can be considered one of the worst email services out there Internet in security matters. In 2014 the company after a hack exposed 500 million accounts, but decided to keep it a secret, exposing its users to very serious risks.
What has changed today? Probably not too much:
Security researcher Jouko Pynnonen has discovered a cross-site scripting (XSS) security flaw in Yahoo Mail that essentially allows an attacker to access any account and read messages electronics post officeu freely.
Yahoo reportedly corrected this flaw last week by rewarding the researcher with 10.000 dollars, according to the company's bug bounty program.
Pynnonen explained that it was possible for an attacker to infiltrate company accounts by simply bypassing filtering HTML used by Yahoo for links that hide malicious JavaScript code.
Worst of all, users didn't even have to click on links or open attachments archives. They just opened the email the hacker sent them.
The flaw allows an attacker to read a victim's email or create a virus to infect Yahoo Mail accounts, among others. The attack requires the victim to see an email sent by the attacker. There is no need for any further interaction (such as clicking on a link or opening an attachment), ”says the researcher.
Yahoo was notified of the hack on November 12 and fixed it on November 29. So now you are supposed to be safe.
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