Rep. Anthony Weiner's Twitter Scandal: What May Have Happened

A tech expert said it's probable a third party who had the user name and password of Rep. Anthony Weiner's Twitter account may be responsible for tweeting a lewd photo to a college student that has landed the Congressman who represents parts of Brooklyn and Queens in hot water.

"This isn't really hacking in the sense that somebody has penetrated the walls of these services and then has access to multiple user accounts and information that is associated with them," said New York bureau chief John Abell. "This is simply a matter of, it would seem, someone having the user name and password of Rep. Weiner, and that could have either been guessed or shared."

Weiner has denied sending a photograph that shows a man in his underwear below the waist, claiming his account was hacked. He said he can not say for certain, however, that the photo is not him.

"I don't want to say with certitude that it didn't start out being a photograph of mine, but now looks like something different that was from another account that was sent to me. I can't say for sure," he told NBC this week.

The service yfrog — which was used to upload a photo from Weiner's account — discontinued their email photo uploading service Thursday.

The photo sharing service disabled their MMS photo uploading services, but noted on its blog the service had not been hacked: "Even though our email upload feature has not been compromised or broken into, we are taking this opportunity to evaluate the feature and secure it even further."

Abell said he doesn’t blame yfrog for the security breach and said its move to suspend MMS service is an overreaction. He said accounts are often hacked into because users choose passwords that are easily guessable.

Weiner said Thursday that he is no longer speaking about the incident to the media. He also said he will continue to be a regular Twitter user.