Index: src/wp-includes/class-wp-customize-control.php
===================================================================
--- src/wp-includes/class-wp-customize-control.php	(revision 30840)
+++ src/wp-includes/class-wp-customize-control.php	(working copy)
@@ -734,10 +734,10 @@
 		?>
 		<label for="{{ data.settings.default }}-button">
 			<# if ( data.label ) { #>
-				<span class="customize-control-title">{{ data.label }}</span>
+				<span class="customize-control-title">{{{ data.label }}}</span>
 			<# } #>
 			<# if ( data.description ) { #>
-				<span class="description customize-control-description">{{ data.description }}</span>
+				<span class="description customize-control-description">{{{ data.description }}}</span>
 			<# } #>
 		</label>