Should you list undergraduate work on your CV?
Your publications are your publications, and unless they have been retracted, you should list them all on your CV. It is up to the reader how to interpret your undergraduate work, and you have minimal control of that in the rather raw format of a CV, whether or not you list them. But consider: if you do list them, then your degree history makes it clear they are from undergrad and to be judged accordingly. If you do not list them, however, then the reader may easily come across them anyway online and be left to wonder what awful shame you are attempting to hide.