I would say that do not allow user to upload the CV. All other websites are doing the same.
Instead of doing this create a custom page for standard CV and ask user to fill his/Her details.
It will have many advantages:
1- All user will have same pattern which is standard created by you. And recruiters like standard CV.
2- And give an option to download the CV after this process sothat user will have the latest standard CV which
is good in format and user will be happy.
3- It will save some memory also as each user will have only 2 pages or more based on condition applied by you.
4- Only one copy should be there in the system.