Even though WordPress is great in being friendly admin user interface and easy to update there are few security issues which needs to be looked at. Implement these basic measures to harden your WordPress installation:
1. Avoid default admin user.
2. Don’t use WP_ prefix.
3. Image Captcha for comments along with moderation.
4. Use BPS security plugin.
5. Regular backups
And finally keep your WordPress updated always. If you need more, write to us at firstname.lastname@example.org and we will take care for you.