There is very little doubt that Facebook (News - Alert) is one of the most popular websites on the Internet today. Because of that there is a plethora of features that the site has attempted to implement to keep their users happy. Unfortunately, when you are talking about hundreds of thousands, if not millions of users all logging onto the same site on a multiple times per day basis, there are going to be some glitches. 

Facebook has come under fire time and time again for exposing its users to various security flaws and outright invasions, but has managed to beat back most criticism with excuses that sound quite a bit like “we're the only game in town.”

That doesn't mean that Facebook hasn't taken steps to try and fix these rampant security flaws. At one time, the site was rumored to actually be paying hackers to try and find the sites most vulnerable points.

On the other hand, some of the security flaws seem to be 100 percent intentional and even implemented by Facebook, like a tracking cookie that was discovered by computer savvy people a few months ago.

The latest security breach might be one of the most off putting the site has been victim to, but Facebook administrators claim that this time, the problem truly wasn't their fault. On Tuesday, cleverly photo-shopped images of big stars like Justin Bieber in pornographic acts were littering the Facebook site, apparently unbidden by its users. 

Facebook claims that some users were tricked into posting a malicious JavaScript code into an unnamed browser's web bar. Once the code was pasted and activated, the code would take over this vulnerable browser and being pasting the offensive images onto the Facebook user's newsfeed.

Since this spam attack, Facebook says it has identified the problem and believes it has taken steps to make sure this particular attack won't work again. Facebook also attempted to calm users by saying that “No user data or accounts were compromised during this attack.”

Security internet firms have said that these kinds of attacks aren't particularly rare and usually trick people into inserting the code by claiming they will receive a free gift or reward by following certain directions.