Unlocked sheet in a locked workbook

Hi,

I have a workbook that is usually fully locked (structure, sheets & VBA) so users can't interfere with the structure or the data and can't see formulas in the file. Now, I would like to add a new tab that would be unlocked and is a blank page so users can use it to "build on" what's already provided by the spreadsheet and sort of customize the information to their needs.

My question: is there any risks that I'm missing of providing a fully unlocked sheet in a workbook that is normally fully protected? (i.e. can they use this sheet to try to hack the VBA, workbook, etc or does it make no difference?). Just trying to avoid compromising my whole spreadsheet just to provide some customization solution to users.

Thanks

If your file is locked (PW protected) but you have left places for them to enter data, then adding an extra sheet will not make the risk any greater

Happy to help and thanks for the feedback