diff --git a/wp-includes/kses.php b/wp-includes/kses.php
index bdb7c5d986..d2f3cbb82e 100644
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -1665,7 +1665,7 @@ function wp_kses_html_error( $string ) {
  */
 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 );
+	$string2 = preg_split( '/:|&#0*58;|&#x0*3a;|:/i', $string, 2 );
 	if ( isset( $string2[1] ) && ! preg_match( '%/\?%', $string2[0] ) ) {
 		$string   = trim( $string2[1] );
 		$protocol = wp_kses_bad_protocol_once2( $string2[0], $allowed_protocols );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 099c8c024f..283b039962 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3.1-RC2-46898';
+$wp_version = '5.3.1-RC2-46899';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.