One of the things that I don't like in ContentBox is the Captcha Widget, and the only reason for that is that the ReCaptcha from Google has all the features to make it better for vision impaired people and others out of the box. The downside to this in ContentBox is that the default themes are hard coded to use the Captcha plugin, inside the widget itself. Which makes for replacing the widget a little difficult.
The one thing we could do is that we could write our own plugin, and replace the usage of this in the themes. But as usual I like to do things a little different, with the following approach it not only shows how I can do this with the Captcha Plugin, but also with any other plugin or component within ContentBox.