If you're taking the technology to perfection then any detectable energy has to apparently pass through volume covered by the cloak entirely unchanged from any angle.
If that's not the case, then the technology isn't perfect.
An energy weapon, being detectable energy, would hence have to apparently pass through without being affected. I fire from one side, the person standing beyond gets fried, volume within cloak doesn't even get warm.
Using known science? No chance. But then known science barely provides energy weapons so I wouldn't worry that much.
It would also be very dark inside the cloak and, if fully concealed by it, you wouldn't be able to see what was going on outside. After all, all detectable energy passes you by.
If you want to be able to see from the inside then the cloak is no longer "perfect", it's now a point along the scale and L.Dutch's calculations for how much energy from weapons penetrates apply along with visible light.