A hacker used an unknown vulnerability to insert a iframe into the theme files for the forum, which could have caused users with unpatched systems to download and run a malicious payload. I have removed the malicious code from the site, and put several precautions in place to prevent a re-occurrence until the vulnerability they exploited can be found and patched.
As a precaution I have also removed all custom plugins from the forum software until they can be manually updated and reinstalled sometime tomorrow. This may result in some missing functionality until then, but better safe than sorry.
All users are strongly encouraged to run anti-virus and anti-malware scans on their machines just to be safe. If you do not have software to do so already, you can download free software programs to run the scans.
AVG Antivirus and
Malware Bytes are the softwares that I personally recommend. Make sure you use the update functionality to ensure that your program will detect the latest threats.
If you see anything unusual with the site please do not hesitate to notify a staff member. Any staff receiving such notification is to call me at home immediately no matter the time of day.