.edu sites Redirection links on Google by using fckeditor vulnerability exploit

I found below .edu and .gov website links on Google search results on the first page. These are redirection links to some other websites. Can someone please tell me how they manage to do this? What method they are using to achieve this?

https://aggieaccess.cameron.edu/html/js/editor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://toprole44.co/get40/?news=13500-free-v-bucks-P3Z6S.php

https://www.royalairmaroc.com/html/js/editor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://urlremove.com/aabbdc/mode-network.html?https://www.haber7.com/

I need to know the menthod and process how they doing