Does JBIMS accept a candidate with zero work experience and a good CET score?

You do not need work experience as a factor for selection. Only a good score on the Common Entrance Test (CET) is sufficient. It is likely that the same process will be followed next year as well. The only exception to this was during the 2015 admissions where work experience was considered, as the admission process included Written Ability Test (WAT), Group Discussion (GD), and Personal Interview (PI).

However, it is advisable for you to have some work experience as it will assist you in having a deeper understanding of the subjects covered in your MBA program. The lack of work experience may or may not impact your chances of securing a good job placement. To gain further insight on this matter, it is recommended that you read my answer on the topic of whether freshers are able to secure good job placement.