Virtualbox Ubuntu 18.04 permission issue to symlinked share host folder
Solution 1:
Do not forget your shared folder is not really a linux filesystem, only looks a bit like it. Copy everything from the share to a real linux filesystem, and try again.
Don't change the properties of the link
sudo chown -R www-data:www-data /var/www/html
Change the properties of the origin
sudo chown -R www-data:www-data /media/sf_Wordpress