wp-includes/class-phpass.php in WordPress 3.5.1, when a password-protected post exists, allows remote attackers to cause a denial of service (CPU consumption) via a crafted value of a certain wp-postpass cookie.
https://github.com/wpscanteam/wpscan/issues/219
http://www.debian.org/security/2013/dsa-2718
http://wordpress.org/news/2013/06/wordpress-3-5-2/
http://openwall.com/lists/oss-security/2013/06/12/2
http://codex.wordpress.org/Version_3.5.2
http://archives.neohapsis.com/archives/bugtraq/2013-06/0052.html