Index: link-template.php
===================================================================
--- link-template.php	(revision 17369)
+++ link-template.php	(working copy)
@@ -1547,7 +1547,7 @@
 			$paged = 1;
 		$nextpage = intval($paged) + 1;
 		if ( !$max_page || $max_page >= $nextpage )
-			return get_pagenum_link($nextpage);
+			return esc_url( get_pagenum_link( $nextpage ) );
 	}
 }
 
@@ -1625,7 +1625,7 @@
 		$nextpage = intval($paged) - 1;
 		if ( $nextpage < 1 )
 			$nextpage = 1;
-		return get_pagenum_link($nextpage);
+		return esc_url( get_pagenum_link( $nextpage ) );
 	}
 }