Use Facebook to log into other apps? Hackers may have breached them too

Facebook shares fell for a third day on Tuesday, dropping 1.9 per cent to $159.33

Facebook said on Tuesday that investigators have determined that hackers did not access other sites that use the social networking site’s single sign-on in a massive cyber attack that the company disclosed last week.

“We analysed third-party access during the time of the attack we have identified. That investigation has found no evidence that the attackers accessed any apps using Facebook Login,” said Guy Rosen, a Facebook vice-president overseeing security, in a statement sent to Reuters.

The announcement comes after Facebook last week disclosed its worst-ever security breach, saying hackers had stolen login codes that allowed them to access nearly