There is an update for WordPress – version 3.9.2 which is a security release for all previous versions.
Most Web South Hosted customers can upgrade with no issues. If unsure – please ask us.
The article on WordPress website about the latest update
Comments: Most of our customers have comments disabled (apparently one of the ways the exploit can occur). There are other issues fixed as well, so it would be worth installing this update as soon as you can.
Thanks once again to the WordPress teams who keep the system going and secure.