First of all - congrats on the loss...that's awesome!

To break your plateau - you need to change something. Either pick a different type of intense cardio or change your diet. Or both.

For cardio, you can either keep the same intensity but change the action (like go from running to spinning or from biking to step aerobics, etc) or you can change the intensity. If you are doing a lot of steady state high intensity cardio - try intervals once a week. If you are already doing intervals, try throwing in a long, low intensity workout one day.

For diet - maybe switch out some of the types of veggies you eat, or perhaps eat more. Or if you get most of your protien from chicken, try using more fish. Small changes within the framework of what is already working for you should help.

Or...you may just have to wait it out. Sometimes the body needs to hang out at a certain level for awhile. If you are consistent with what you are doing and you are creating a deficit, eventually the weight has to come off. The question becomes, can you wait it out? (I never seem to have the patience, myself! )