download.php in the MuddyDogPaws FileDownload snippet before 2.5 for MODx allows remote attackers to download arbitrary files, as demonstrated by downloading config.inc.php to obtain database credentials.
http://www.vupen.com/english/advisories/2007/0426
http://www.securityfocus.com/bid/22327
http://www.muddydogpaws.com/Home.html