From e4b252fced7b51f2cf4e7d4ba56453bc6b373296 Mon Sep 17 00:00:00 2001
From: Peter Wilson <519727+peterwilsoncc@users.noreply.github.com>
Date: Wed, 12 Jul 2023 09:09:07 +1000
Subject: [PATCH] Escape theme activation nonce for output.

---
 lib/compat/wordpress-6.3/theme-previews.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/compat/wordpress-6.3/theme-previews.php b/lib/compat/wordpress-6.3/theme-previews.php
index 26153d74878b58..78d8079a1ec51e 100644
--- a/lib/compat/wordpress-6.3/theme-previews.php
+++ b/lib/compat/wordpress-6.3/theme-previews.php
@@ -107,7 +107,7 @@ function block_theme_activate_nonce() {
 	$nonce_handle = 'switch-theme_' . gutenberg_get_theme_preview_path();
 	?>
 <script type="text/javascript">
-	window.WP_BLOCK_THEME_ACTIVATE_NONCE = '<?php echo wp_create_nonce( $nonce_handle ); ?>';
+	window.WP_BLOCK_THEME_ACTIVATE_NONCE = <?php echo wp_json_encode( wp_create_nonce( $nonce_handle ) ); ?>;
 </script>
 	<?php
 }