U.S. business publication Fast Company disclosed that while the cyberattack it experienced late last month has not compromised personal information from its executive board members, contributor credentials have been stolen and sold online, BleepingComputer reports. "The hacked downloaded Fast Company contributor user names and passwords and made the obtained information available for purchase on the website called Breach Forums," said Fast Company in a data breach notification. Fast Company earlier said that it has sought a top incident response and cybersecurity company to help in its investigation of the incident but the publication has yet to divulge more details about the attack. Fast Company had its website shut down two weeks ago after racist notifications were sent by the hacker to readers' mobile devices through Apple News and after the site was defaced to display that it had been hacked by security researcher Vinny Troia. Thrax, who claimed to be behind the intrusion, noted that Fast Company had been compromised through a breach of its site's content management system.