diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 8a91d152bf..dad7f15862 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -616,7 +616,7 @@ function maybe_serialize( $data ) {
  */
 function maybe_unserialize( $data ) {
 	if ( is_serialized( $data ) ) { // Don't attempt to unserialize data that wasn't serialized going in.
-		return @unserialize( $data );
+		return @unserialize( trim( $data ) );
 	}
 
 	return $data;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index f2eb4c844b..ee22aa3910 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-47453';
+$wp_version = '5.5-alpha-47454';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.