The open source nature of WordPress has one downside, and if you’re not careful it could ruin your online business. I know this because it happened to me. Just a few months ago, I had a hacker hijack a WordPress site that was consistently earning me several hundred dollars a month.
Blocked all logins from my IP address
Deleted 217 pages of content, including over 50 pages of premium membership content.
Posted 182 spam articles on my site, all which were visible from the home page and which tanked my search engine rankings.