In general, dream in which kidnapping is prominently featured can have different interpretations. Historically it was considered a bad omen, though modern dream analysis can sometimes ascribe more positive meaning to it.
If in your dream you see a person that you don’t know being kidnapped it signifies that you will come to a conclusion that your environment might restrict your appetite for easy living. Sometimes this dream can signify that you feel a need for societal change in real life.
A dream in which a person that you know is kidnapped signifies that there will be trouble between you and the said person in real life. A serious conflict might arise even if the person is a good friend of yours.
If someone that you know is kidnapped and you receive a request for a ransom it signifies that you need to be careful in your professional life. You are being watched in way by a powerful enemy and someone is waiting for you to make a mistake.
If you dream that you are involved into a kidnapping it means that in real life you will be offered to take part into dubious deal. The deal might seem promising however the possibility for failure will be high.
If you try to prevent the kidnapping of someone it means that you will be ready to help whey they ask you for that. If this dream is reoccurring, it means that you will save someone from a great tragedy in real life.
Dreaming that you are kidnapped can signify that people are trying to work around you authority at your work place. Be careful of sneaky moves in your professional life in general.
If in the dream you escape your kidnappers it can be seen as sign of unexpected but positive turn of events in your professional life.