Ticket #40070: 40070.diff

wp-admin/includes/ajax-actions.php

@@ -3507 +3507 @@
                 ) );
         }
 
-        $stylesheet = preg_replace( '/[^A-z0-9_\-]/', '', wp_unslash( $_POST['slug'] ) );
+        $stylesheet = preg_replace( '/[^A-z0-9._\-]/', '', wp_unslash( $_POST['slug'] ) );
         $status     = array(
                 'delete' => 'theme',
                 'slug'   => $stylesheet,