CVE-2009-2762
wp-login.php in WordPress 2.8.3 and earlier allows remote attackers to force a password reset for the first user in the database, possibly the administrator, via a key[] array variable in a resetpass (aka rp) action, which bypasses a check that assumes that $key is not an array.
Date published : 2009-08-13
http://www.securityfocus.com/bid/36014
http://wordpress.org/development/2009/08/2-8-4-security-release/