Chmod File and Folder Permission - Oprekin

chmod 777 chmod 777 foldername will give read, write, and execute permissions for everyone. chmod 700 foldername will give read, write, and execute. 777 means User, Group, and Others all have full read, write, and execute permissions. However, granting such permissions can pose a security risk.

cemara777, chmod 777 makes a filefolder readable, write-able and executable by everyone. So essentially on your site folder, you have given everyone permission to write to that folder, so you have.