diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index 0c3fd2251f..aa6a724814 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -1575,8 +1575,8 @@ function wp_audio_shortcode( $attr, $content = '' ) {
 	$html_atts = array(
 		'class'    => apply_filters( 'wp_audio_shortcode_class', 'wp-audio-shortcode' ),
 		'id'       => sprintf( 'audio-%d-%d', $post_id, $instances ),
-		'loop'     => $atts['loop'],
-		'autoplay' => $atts['autoplay'],
+		'loop'     => wp_validate_boolean( $atts['loop'] ),
+		'autoplay' => wp_validate_boolean( $atts['autoplay'] ),
 		'preload'  => $atts['preload'],
 		'style'    => 'width: 100%; visibility: hidden;',
 	);
@@ -1801,8 +1801,8 @@ function wp_video_shortcode( $attr, $content = '' ) {
 		'width'    => absint( $atts['width'] ),
 		'height'   => absint( $atts['height'] ),
 		'poster'   => esc_url( $atts['poster'] ),
-		'loop'     => $atts['loop'],
-		'autoplay' => $atts['autoplay'],
+		'loop'     => wp_validate_boolean( $atts['loop'] ),
+		'autoplay' => wp_validate_boolean( $atts['autoplay'] ),
 		'preload'  => $atts['preload'],
 	);