Ticket #55109: 55109.diff

src/wp-admin/includes/file.php

@@ -1198 +1198 @@
                 if ( $tmpfname_disposition && is_string( $tmpfname_disposition )
                         && ( 0 === validate_file( $tmpfname_disposition ) )
                 ) {
+                        $tmpfname_disposition = dirname( $tmpfname ) . '/' . $tmpfname_disposition;     
                         if ( rename( $tmpfname, $tmpfname_disposition ) ) {
                                 $tmpfname = $tmpfname_disposition;
                         }