Manual:$wgAllowCopyUploads

Details
Users also need to have the associated GroupPermissions>Special:MyLanguage/Manual:$wgGroupPermissions|user right  before this option is available.

By default only administrators (sysops) have this permission.

By default, upload by URL are only possible using the upload>Special:MyLanguage/API:Upload|API (or extensions such as ).

To make the option usable from Special:Upload, you need to set   to true as well.

By default, any source URL location is allowed, but you can whitelist a specific set by using  .

Example usage
This example setup will allow all autoconfirmed users to upload by URL, via Special:Upload or the API.

Add to the bottom of your :