Cross-site request forgery (CSRF) vulnerability in wp-login.php in WordPress 3.7.4, 3.8.4, 3.9.2, and 4.0 allows remote attackers to hijack the authentication of arbitrary users for requests that reset passwords.
https://wordpress.org/news/2014/11/wordpress-4-0-1/
http://www.securitytracker.com/id/1031243
http://www.mandriva.com/security/advisories?name=MDVSA-2014:233
http://www.debian.org/security/2014/dsa-3085
http://openwall.com/lists/oss-security/2014/11/25/12