Ticket #30682: 30682.2.patch

src/wp-includes/class-wp-customize-control.php

@@ -737 +737 @@
                                 <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>