From 1f26aab97c03a80432865ef81f259f62f3c883f4 Mon Sep 17 00:00:00 2001
From: desrosj <desrosj@git.wordpress.org>
Date: Wed, 4 Sep 2019 21:38:37 +0000
Subject: [PATCH] Fix for URL sanitization in `wp_kses_bad_protocol_once()`.

Merges [45997] to the 5.0 branch.

Props irsdl, sstoqnov, whyisjake.
Built from https://develop.svn.wordpress.org/branches/5.0@46004


git-svn-id: http://core.svn.wordpress.org/branches/5.0@45815 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/kses.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/wp-includes/kses.php b/wp-includes/kses.php
index 1231c0a8ed..1adb340a98 100644
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -1407,6 +1407,7 @@ function wp_kses_html_error($string) {
  * @return string Sanitized content
  */
 function wp_kses_bad_protocol_once($string, $allowed_protocols, $count = 1 ) {
+	$string  = preg_replace( '/(&#0*58(?![;0-9])|&#x0*3a(?![;a-f0-9]))/i', '$1;', $string );
 	$string2 = preg_split( '/:|&#0*58;|&#x0*3a;/i', $string, 2 );
 	if ( isset($string2[1]) && ! preg_match('%/\?%', $string2[0]) ) {
 		$string = trim( $string2[1] );