Ticket #19800: uploader-19800-patch.diff

wp-admin/includes/file.php

@@ -323 +323 @@
 
         $filename = wp_unique_filename( $uploads['path'], $file['name'], $unique_filename_callback );
 
-        $tmp_file = wp_tempnam($filename);
+        $tmp_file = wp_tempnam( $filename, "{$uploads['path']}/" );
 
         // Move the file to the uploads dir
         if ( false === @ move_uploaded_file( $file['tmp_name'], $tmp_file ) )