WordPress is pretty secure and they release updates periodically to fix loopholes, to stay safe you should always make sure to upgrade to the latest version of the software whenever they are available.
However there are several more ways in which you can protect your WordPress admin from getting misused or hacked.
The folks at WP Beginners have come up with a list of 11 vital tips to better protect your WordPress admin area, the tips include using a plugin to create stealth login URLs, limiting login attempts to a certain limit so that you don’t get hit with a brute force attack among other things.
11 Vital Tips and Hacks to Protect Your WordPress Admin Area
Thanks for the mention. We would also like to hear from the WordPress community if there are any other ways that users are taking to protect their WordPress admin area.
The tips are interesting indeed, yet I see they jump into “13” now 😀