84% of the WordPress site can be hacked: What’s Next?

> This vulnerability applies to all versions of WordPress 3.0 and higher. Problem can be solved upgrade engine to version 4, where no such problem.

The XSS patches from 4.0.1 were back-ported to 3.9.3, 3.8.5, and 3.7.5. People should still upgrade to 4.0.1, but the situation is not as dire as this post makes it out to be.