Looks like Google reviewed the website and took it off of their blacklist! Hooray!
Browsers seem to be reflecting this, but the search index has not quite caught up. Will probably take a couple of days for that to happen.
In order to ensure the security of the forum I disabled all 3rd party plugins. I am slowly going to be re-enabling them over time ensuring first that they don't have any security vulnerabilities. This does however mean that some functionality will be missing for the time being.
Thanks for all the patience everyone!