diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 8179b93596..1446cb753c 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -1270,7 +1270,7 @@ function wp_nonce_ays($action) {
 
 	$adminurl = get_option('siteurl') . '/wp-admin';
 	if ( wp_get_referer() )
-		$adminurl = wp_get_referer();
+		$adminurl = attribute_escape(wp_get_referer());
 
 	$title = __('WordPress Confirmation');
 	// Remove extra layer of slashes.
@@ -1287,7 +1287,7 @@ function wp_nonce_ays($action) {
 		$html .= "\t\t<input type='hidden' name='_wpnonce' value='" . wp_create_nonce($action) . "' />\n";
 		$html .= "\t\t<div id='message' class='confirm fade'>\n\t\t<p>" . wp_specialchars(wp_explain_nonce($action)) . "</p>\n\t\t<p><a href='$adminurl'>" . __('No') . "</a> <input type='submit' value='" . __('Yes') . "' /></p>\n\t\t</div>\n\t</form>\n";
 	} else {
-		$html .= "\t<div id='message' class='confirm fade'>\n\t<p>" . wp_specialchars(wp_explain_nonce($action)) . "</p>\n\t<p><a href='$adminurl'>" . __('No') . "</a> <a href='" . add_query_arg( '_wpnonce', wp_create_nonce($action), $_SERVER['REQUEST_URI'] ) . "'>" . __('Yes') . "</a></p>\n\t</div>\n";
+		$html .= "\t<div id='message' class='confirm fade'>\n\t<p>" . wp_specialchars(wp_explain_nonce($action)) . "</p>\n\t<p><a href='$adminurl'>" . __('No') . "</a> <a href='" . attribute_escape(add_query_arg( '_wpnonce', wp_create_nonce($action), $_SERVER['REQUEST_URI'] )) . "'>" . __('Yes') . "</a></p>\n\t</div>\n";
 	}
 	$html .= "</body>\n</html>";
 	wp_die($html, $title);