WordPress is a system but software has their flaws and security holes are often found on WP. This is why WP often releases updates. They immediately make some changes and supply a new update once they found any vulnerability . If you want to know more blog here about the best how to fix hacked wordpress plugin, where these plug-ins work to assist you protect your investment, first you have to understand the different areas .
Don't make the mistake of thinking that your web host will have your back as far as WordPress backups go. Not always. It's been my experience that the hosting company may or may not be doing proper backups while they say they do. Take that kind of chance?
Yes, you want to do regular backups of your website. I recommend at least a weekly database backup and a monthly "full" backup. More. If you make changes and frequent additions to your website, definitely. If you make changes multiple times every day, or have a community of people that are in there all the time, a daily backup should be a minimum.
As I (our untrue Joe the Hacker) know, people have way too many usernames and passwords to remember. You have got Twitter, Facebook, your online banking, LinkedIn, two site logins, FTP, web hosting, etc. accounts that all come with logins and passwords you will need to remember.
Implementing all of the above will take less than an hour to complete, while making your WordPress website considerably more immune to intrusions. Sites were cracked last year, mainly due to easily preventable security gaps. Have yourself prepared and you're likely to be on the safe side.