Pull the drawer completely out so it is free from the cabinet and empty it. Cut/pull the exposed staples. Clean it up. Dry fit it so it goes back together well and seats as flush as it used to. Titebond wood glue all connecting surfaces, both sides. Fit the drawer front back on the drawer body and set it either front face down on a table with a book or three on the top, or drawer back side down with books/weight on the top/drawer face. Let glue cure for 24 hours. That should honestly be enough unless it gets a lot of abuse. If that's the case, some wood corner/shoe moulding glued into the inside left and right corners afterward should keep it intact. Wood glue is strong AF. Stronger than the wood that drawer is made from.