From 84ad22efe9549ddbd4dd8123589905f927f17cf7 Mon Sep 17 00:00:00 2001
From: Dominik Schilling <dominikschilling+git@gmail.com>
Date: Wed, 30 Mar 2016 15:52:49 +0000
Subject: [PATCH] HTTP: Improve detection of valid IP addresses.

Merge of [37115] to the 4.0 branch.
Built from https://develop.svn.wordpress.org/branches/4.0@37120


git-svn-id: http://core.svn.wordpress.org/branches/4.0@37087 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/http.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-includes/http.php b/wp-includes/http.php
index b8d3e490c3..6bcf91d710 100644
--- a/wp-includes/http.php
+++ b/wp-includes/http.php
@@ -465,7 +465,7 @@ function wp_http_validate_url( $url ) {
 
 	if ( ! $same_host ) {
 		$host = trim( $parsed_url['host'], '.' );
-		if ( preg_match( '#^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $host ) ) {
+		if ( preg_match( '#^(([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)\.){3}([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)$#', $host ) ) {
 			$ip = $host;
 		} else {
 			$ip = gethostbyname( $host );