diff -r be944660c56a -r 3d72ae0968f4 wp/wp-includes/blocks/post-title.php
--- a/wp/wp-includes/blocks/post-title.php	Wed Sep 21 18:19:35 2022 +0200
+++ b/wp/wp-includes/blocks/post-title.php	Tue Sep 27 16:37:53 2022 +0200
@@ -19,7 +19,13 @@
 		return '';
 	}
 
-	$post_ID          = $block->context['postId'];
+	$post_ID = $block->context['postId'];
+	$title   = get_the_title();
+
+	if ( ! $title ) {
+		return '';
+	}
+
 	$tag_name         = 'h2';
 	$align_class_name = empty( $attributes['textAlign'] ) ? '' : "has-text-align-{$attributes['textAlign']}";
 
@@ -27,9 +33,8 @@
 		$tag_name = 0 === $attributes['level'] ? 'p' : 'h' . $attributes['level'];
 	}
 
-	$title = get_the_title( $post_ID );
 	if ( isset( $attributes['isLink'] ) && $attributes['isLink'] ) {
-		$title = sprintf( '<a href="%1s" target="%2s" rel="%3s">%4s</a>', get_the_permalink( $post_ID ), $attributes['linkTarget'], $attributes['rel'], $title );
+		$title = sprintf( '<a href="%1$s" target="%2$s" rel="%3$s">%4$s</a>', get_the_permalink( $post_ID ), esc_attr( $attributes['linkTarget'] ), esc_attr( $attributes['rel'] ), $title );
 	}
 	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $align_class_name ) );