fix: allow svg in storefront messages, such as notices

inc/woocommerce/storefront-woocommerce-template-functions.php

@@ -235,9 +235,33 @@ function storefront_product_columns_wrapper_close() {
 	 */
 	function storefront_shop_messages() {
 		if ( ! is_checkout() ) {
-			echo wp_kses_post( storefront_do_shortcode( 'woocommerce_messages' ) );
+			$kses_defaults = wp_kses_allowed_html( 'post' );
+
+			$svg_args = array(
+				'svg'   => array(
+					'class'           => true,
+					'aria-hidden'     => true,
+					'aria-labelledby' => true,
+					'role'            => true,
+					'xmlns'           => true,
+					'width'           => true,
+					'height'          => true,
+					'viewbox'         => true,
+				),
+				'g'     => array( 'fill' => true ),
+				'title' => array( 'title' => true ),
+				'path'  => array(
+					'd'               => true,
+					'fill'            => true
+				)
+			);
+
+			$allowed_tags = array_merge( $kses_defaults, $svg_args );
+
+			echo wp_kses( storefront_do_shortcode( 'woocommerce_messages' ), $allowed_tags );
 		}
 	}
+
 }
 
 if ( ! function_exists( 'storefront_woocommerce_pagination' ) ) {