I’ve had a couple burn a hole clear through the base.
I do not know your particular situation, however, using CFL lamps in an enclosed environment will sometimes cause catastrophic failure.
Also if they are used in the base up position CFL lamps can over-heat if they do not have enough ventilation. This is caused from the electronics necessary to maintain the fluorescent arc located in the base.
Not a bad technology just does not have the right information surrounding it to make sure that there are no issues.