diff --git a/wp-admin/includes/post.php b/wp-admin/includes/post.php
index 77aadb2135..87f1fcac5c 100644
--- a/wp-admin/includes/post.php
+++ b/wp-admin/includes/post.php
@@ -2303,7 +2303,7 @@ function the_block_editor_meta_boxes() {
 	<?php the_block_editor_meta_box_post_form_hidden_fields( $post ); ?>
 	</form>
 	<form id="toggle-custom-fields-form" method="post" action="<?php echo esc_attr( admin_url( 'post.php' ) ); ?>">
-		<?php wp_nonce_field( 'toggle-custom-fields' ); ?>
+		<?php wp_nonce_field( 'toggle-custom-fields', 'toggle-custom-fields-nonce' ); ?>
 		<input type="hidden" name="action" value="toggle-custom-fields" />
 	</form>
 	<?php foreach ( $locations as $location ) : ?>
diff --git a/wp-admin/post.php b/wp-admin/post.php
index c4a0ab17e5..a1113ed35f 100644
--- a/wp-admin/post.php
+++ b/wp-admin/post.php
@@ -339,7 +339,7 @@ switch ( $action ) {
 		exit;
 
 	case 'toggle-custom-fields':
-		check_admin_referer( 'toggle-custom-fields' );
+		check_admin_referer( 'toggle-custom-fields', 'toggle-custom-fields-nonce' );
 
 		$current_user_id = get_current_user_id();
 		if ( $current_user_id ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index b1bdd72957..49e916b9ef 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-beta1-50238';
+$wp_version = '5.7-beta1-50255';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.