WordPress 2.0.11 and earlier allows remote attackers to obtain sensitive information via an empty value of the page parameter to certain PHP scripts under wp-admin/, which reveals the path in various error messages.
http://www.securityfocus.com/archive/1/485786/100/0/threaded
http://websecurity.com.ua/1687/
http://websecurity.com.ua/1686/
http://websecurity.com.ua/1683/
http://websecurity.com.ua/1679/
http://securityvulns.ru/Sdocument773.html
http://securityvulns.ru/Sdocument772.html
http://securityvulns.ru/Sdocument768.html