WauchulaGhost hacker who breached 500 ISIS accounts on Twitter advised the U.S. President Donald Trump to change the security settings of his Twitter account in order to avoid hacking as soon as possible, CNN reported.

According to him, accounts of the president (@POTUS), the First Lady (@FLOTUS) and the vice-president (@VP) are more vulnerable because they have notselected a basic security feature on Twitter that requires you to provide a phone number or email address to reset your password.

Hackers can start by guessing an email account, then breaching said email account, resetting the Twitter password and taking over the account.