Multiple directory traversal vulnerabilities in plugins/wp-db-backup.php in WordPress before 2.0.5 allow remote authenticated users to read or overwrite arbitrary files via directory traversal sequences in the (1) backup and (2) fragment parameters in a GET request.
http://www.vupen.com/english/advisories/2006/4307
http://www.securityfocus.com/bid/20869
http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.027-wordpress.html
http://www.gentoo.org/security/en/glsa/glsa-200611-10.xml
http://wordpress.org/development/2006/10/205-ronan/
http://trac.wordpress.org/changeset/4226
http://secunia.com/advisories/22942
http://secunia.com/advisories/22683
http://markjaquith.wordpress.com/2006/10/17/changes-in-wordpress-205/