Ticket #62787: 62787.patch

wp-content/themes/twentynineteen/functions.php

@@ -342 +342 @@
         ?>
 
         <style type="text/css" id="custom-theme-colors" <?php echo is_customize_preview() ? 'data-hue="' . absint( $primary_color ) . '"' : ''; ?>>
-                <?php echo twentynineteen_custom_colors_css(); ?>
+                <?php echo esc_html( twentynineteen_custom_colors_css() ); ?>
         </style>
         <?php
 }