Multiple directory traversal vulnerabilities in PowerScripts PowerNews 2.5.6 allow remote attackers to read and include arbitrary files via a .. (dot dot) in the (1) subpage parameter in (a) categories.inc.php, (b) news.inc.php, (c) other.inc.php, (d) permissions.inc.php, (e) templates.inc.php, and (f) users.inc.php in pnadmin/; and (2) the page parameter to (g) pnadmin/index.php.  NOTE: vector 2 is only exploitable by administrators.