The new site CNET has been attacked by a Russian hacker group.
The group are said to have stolen usernames, encrypted passwords and emails from more than one million users.
CNET said a member of the group - which called itself 'w0rm' - informed them about the hack on Twitter.
The representative of the group said: "[W]e are driven to make the Internet a better and safer [place] rather than a desire to protect copyright."
'W0rm' was also said to have hacked the BBC last year, as well as websites of Adobe and Bank of America, claiming that hacking high-profile websites can raise awareness of security issues.
According to CNET 27.1 million unique users visited its desktop and mobile sites in the US in June this year.
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