Thousands of user names and passwords for Comcast customers was removed from document sharing Web site Scribd, two months after it was posted there.

Scribd did not know the list was there until hack Brad Stone at The New York Times warned it about it. Stone was contacted by a Comcast customer who happened across the list after doing a search on his own e-mail address on search engine Pipl.

Comcast spokeswoman Jennifer Khoury told The New York Times that the list was probably compiled from phishing or some other related type of attack and not from inside Comcast.

Email accounts of customers whose data was exposed have been frozen and Comcast is contacting them. More than 4,000 names and emails were exposed according to CNet.

More here.