just happened.... heard a strange "popping" sound whenever the bass would hit, check it out and saw that. haven't even put any power to the subs or played anything off them since it happened
if it sounds fine, then no its not trashed, if it sounds messed up, then go glue it like supaC said and see if that works, if not then yeah its trashed, and u can replace it with something good.
CA stands for Cyanoacrylate, which is the exact same thing as superglue (most superglues are like 98% CA). I've used my fair share of CA glue and superglue works just as good. Epoxy or rubber cement might work as well.