If there is one thing every single WordPress user must realize it is that if you maintain your own blog using this blogging tool, keep it up to date! As this article illustrates, having your WP blog hacked is not nearly as unlikely as we might like to believe.
Worse yet is the fact that avoiding this sort of easy exploit is so easily avoidable! Just keep things up to date when WordPress prompts you — it’s just that easy. Not taking action now could very well cost you revenue and worse, your blog, as those who wish to exploit your carelessness likely will take advantage of that fact.
If it is already too late and you find that you have been hacked into already, follow the instructions in the link above as it provides a solid outline of some battle plans you can put to work before you lose things completely.