Directory traversal vulnerability in wp-db-backup.php in WordPress 2.0.3 and earlier allows remote attackers to read arbitrary files, delete arbitrary files, and cause a denial of service via a .. (dot dot) in the backup parameter in a wp-db-backup.php action to wp-admin/edit.php. NOTE: this might be the same as CVE-2006-5705.1.
http://www.securityfocus.com/bid/27123
http://www.securityfocus.com/archive/1/485786/100/0/threaded
http://www.debian.org/security/2008/dsa-1502
http://websecurity.com.ua/1676/
http://securityvulns.ru/Sdocument755.html