Days after user personal surfaced online, the genetic testing company 23andMe said it’s requiring all users to reset their passwords “out of caution.” On Friday, 23andMe confirmed that hackers had obtained some users’ data, but stopped short of calling the incident a data breach. The company said that the hackers had accessed “certain accounts” of 23andMe users who used passwords that were not unique to the service — a common technique where hackers try to break into victim’s accounts using passwords that have already been made public in previous data breaches. 23andMe’s announcement came two days after hackers advertised an...