At the moment maven plugin use it internal defaults about embedded Jetty version that plugin use.
I with to have an ability to specify Jetty's version something like this:
and it looks natural that maven plugin will pick up particular Jetty version from maven repository (http://www.mvnrepository.com/artifact/org.mortbay.jetty/jetty) together with all its depenedencies.
@alitokmen: I rather think it will probably be something like:
Therefore, the user would declare all versions of dependencies to override. We would in this case need to document all usable properties somewhere, and keep the list updated.