According to Twitter, the personal data of nearly 33 million of its users are presently at risk due to malware that may have trolled the information from users, not the company. Millions of usernames, emails and, in some cases, passwords are listed for sale on the dark web. Similar leaks in the past month have impacted users of LinkedIn, Myspace and some Russian-language sites. “The website that published the Twitter passwords, LeakedSource, says it has more than 1.8 billion records in its database,” reports The Wall Street Journal. “LeakedSource sells access to these records for a fee.” Twitter is encouraging its users to change their passwords.