Update: For those who may be concerned that they were hacked, the above hack only affected visitors who were not logged in. If you were logged into the site during that period you would not have been shown the code.
It appears that the malicious code was a multi-exploit kit that was being used to try and exploit common vulnerabilities on your computer to install malware. What that means is that if you have the latest version of Java, Adobe Reader, Shockwave, Realplayer, or Flash and all your Windows updates then your computer would not have been affected. So as an aside, please make sure you always keep your programs, especially those I just listed, updated and all your Windows updates installed. Instructions on using Secunia PSI to scan for outdated programs can be found here:How to detect vulnerable and out-dated programs using Secunia Personal Software Inspector
For those who may have been infected, though, then you may find that your computer has become infected with the TDSS infection. I suggest that you follow the steps here:How to remove Google Redirects or the TDSS, TDL3, or Alureon Rootkit
You will know that your computer is infected when you attempt to click on a Google search result and are redirected to a different page than you should be going to.
I have tested TDSSKiller against the malware that may have been installed and it should be able to remove it.
When done, I also suggest scan your computer using a variety of tools such as ESet Online Scanner
, Kaspersky Online Scanner
, and Malwarebytes' Anti-Malware
. I know for a fact that MalwareBytes, if installed, would have blocked access to the site running the exploits.
Once again, I am sorry that this happened and I stress that I always prioritize the security of our visitors and the site ahead of any other tasks. If you have any questions, concerns, or issues please ask here.
I would also like to send a big thanks to tetonbob for notifying me about the issue and helping me test it. Thanks again!