diff --git a/lib/weblib.php b/lib/weblib.php
index 3a107bff19f..543ebd2f707 100644
--- a/lib/weblib.php
+++ b/lib/weblib.php
@@ -2194,6 +2194,7 @@ function print_header ($title='', $heading='', $navigation='', $focus='',
     $bodytags .= ' class="'.$pageclass.'" id="'.$pageid.'"';
 
     ob_start();
+    $title = s($title); // fix for MDL-8582
     include($CFG->header);
     $output = ob_get_contents();
     ob_end_clean();