diff --git a/wp-admin/includes/class-wp-comments-list-table.php b/wp-admin/includes/class-wp-comments-list-table.php
index 2fbbbc3328..9f7a998a4d 100644
--- a/wp-admin/includes/class-wp-comments-list-table.php
+++ b/wp-admin/includes/class-wp-comments-list-table.php
@@ -947,7 +947,12 @@ class WP_Comments_List_Table extends WP_List_Table {
 		echo '</strong><br />';
 
 		if ( ! empty( $author_url_display ) ) {
-			printf( '<a href="%s">%s</a><br />', esc_url( $author_url ), esc_html( $author_url_display ) );
+			// Print link to author URL, and disallow referrer information (without using target="_blank").
+			printf(
+				'<a href="%s" rel="noopener noreferrer">%s</a><br />',
+				esc_url( $author_url ),
+				esc_html( $author_url_display )
+			);
 		}
 
 		if ( $this->user_can ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 01e3c1a53e..f6e20b2eef 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-52006';
+$wp_version = '5.9-alpha-52007';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.