diff --git src/wp-admin/includes/class-wp-screen.php src/wp-admin/includes/class-wp-screen.php
index 4bb5995e7f..b06f665b98 100644
--- src/wp-admin/includes/class-wp-screen.php
+++ src/wp-admin/includes/class-wp-screen.php
@@ -896,7 +896,7 @@ final class WP_Screen {
 
 					<?php if ( $help_sidebar ) : ?>
 					<div class="contextual-help-sidebar">
-						<?php echo $help_sidebar; ?>
+						<?php echo wp_kses_post( $help_sidebar ); ?>
 					</div>
 					<?php endif; ?>
 
@@ -910,7 +910,7 @@ final class WP_Screen {
 							<div id="<?php echo esc_attr( $panel_id ); ?>" class="<?php echo $classes; ?>">
 								<?php
 								// Print tab content.
-								echo $tab['content'];
+								echo wp_kses_post( $tab['content'] );
 
 								// If it exists, fire tab callback.
 								if ( ! empty( $tab['callback'] ) ) {
diff --git src/wp-admin/includes/dashboard.php src/wp-admin/includes/dashboard.php
index b198325f27..9215c8f4cc 100644
--- src/wp-admin/includes/dashboard.php
+++ src/wp-admin/includes/dashboard.php
@@ -435,7 +435,7 @@ function wp_dashboard_right_now() {
 	if ( ! empty( $actions ) ) :
 		?>
 	<div class="sub">
-		<?php echo $actions; ?>
+		<?php echo wp_kses_post( $actions ); ?>
 	</div>
 		<?php
 	endif;