Ticket #25385: 25385.patch

wp-includes/pluggable.php

@@ -455 +455 @@
 }
 endif;
 
+if( !function_exists('is_url') ) {
+        /**
+         * Provides minimal validation that a string looks like a URL verifying only that it begins with http or https
+         * Note that strings without dots (i.e. localhost) are considered valid RFC domain names so validation does 
+         * not look for .com, .net, etc
+         *
+         * @since 3.0
+         * @param string $url A URL to be validated. 
+         * @return boolean
+        */
+        function is_url( $url )
+        {
+                preg_match( '#http(s?)://(.+)#i', $url, $matches );
+                if( empty( $matches ) )
+                        return false;
+                        
+                return true;
+        }
+}
+
 if ( !function_exists('wp_authenticate') ) :
 /**
  * Checks a user's login information and logs them in if it checks out.

wp-comments-post.php

@@ -111 +111 @@
 
 $comment_type = '';
 
+if ( ! is_url ( $comment_author_url ) ) {
+        wp_die( __('<strong>ERROR</strong>: please enter a valid website address.') );
+}
+
 if ( get_option('require_name_email') && !$user->exists() ) {
         if ( 6 > strlen($comment_author_email) || '' == $comment_author )
                 wp_die( __('<strong>ERROR</strong>: please fill the required fields (name, email).') );