PC Magazine: Twitter Says ‘Security Incident’ Caused Circles Tweets Leak

PC Magazine: Twitter Says ‘Security Incident’ Caused Circles Tweets Leak. “Twitter has admitted that an incident where private tweets intended for posters’ close friends that ended up on strangers’ feeds happened because of a security breach, The Guardian reports(Opens in a new window). Twitter Circles permits users to set a list of close friends and post tweets that only they can read. The incident last month saw Circle tweets popping up in the For You timeline of users who followed the Circle tweet poster but aren’t in their Circle.”