How to get which CKEditor version is your drupal installation running?

There is a simple way to do this over dev tools in browser, just to to "node edit" or a place where CKEditor is active and run

alert(CKEDITOR.version);

and you will get the version. Currently, it is at 4.14.1 which is almost the latest in 4.x versions, but there is also 5.x version that drupal is still not using.