CFL's, in fact ALL fluorescent bulbs (compact or not) naturally emit SOME ultraviolet light as a product of the process by which they produce light.
A FL is a gas discharge lamp that produces ultraviolet radiation through excitation of mercury atoms. The inside of the lamp is coated in phosphorus, that absorbs UV and emits visible light. The glass bulb itself also absorbs significant amounts of UV. In addition, if a lamp is covered with a glass lamp shade (like the ceiling lamps that provide diffuse lighting) the UV output is further decreased.
The question then becomes, how much of the UV reaches the outside world. Since the absorption cross section of the glass and the phosphorus is finite, some of UV will pass through.
The answer is - not much - at least by any natural comparable standard. Unless you are several inches from the CFL, a full working day exposure to CFL light is equivalent to several minutes - or less - of direct sunlight. Which means that a regular human being is unlikely to experience any negative effects from the ultraviolet dose he/she receives.
However, an individual with UV sensitivity, might experience negative health effects even from such a limited exposure to UV radiation.
It is also important to note that old or aging CFL's may have degradation of the phosphorus coating, CFL's that have a "clear spot" where the phosphorus has flaked off can be the source of dangerous amounts of UV and should be immediately replaced.