How to Check your WordPress Version
It’s a good idea to keep your WordPress version up-to-date. Using the most current version of WordPress helps keep your site secure. You can easily see which version of WordPress you are using by logging in to the admin area of your WordPress site. Click on Dashboard from the left-hand menu.
From the dashboard page, scroll down to the bottom. You will find ‘Thanks for creating with WordPress’ line. Next to it, you will see WordPress version number. You can also see the version number in the ‘At-a-Glance’ section.
If you do not see the ‘At-a-Glance section, go to Screen Options to select.
How to Check Which Plugin Version You are Using
The easiest way to find the version number for a plugin on your site is by logging in to the admin area of your site and going to the plugins page from the left-hand menu.
Here you can see the version number for every plugin installed on your site.