If you are copy/pasting text + image from Word, the image indeed is not pasted as expected, but this is due to the browser's security policy that we do not have control over. You can verify if that is the case in the browser dev tools console. In Chrome an exception will be thrown (Not allowed to load local resource...), more on which you can find in this stackoverflow thread
See this dojo
, in which below the editor there is a standard div HTML element (with attribute contenteditable="true"). The browser will block pasting text + image copied from Word in both the Editor and in the div below it.
Within the Editor itself copy/pasting text + image works as expected (screencast