The (1) get_edit_post_link and (2) get_edit_comment_link functions in wp-includes/link-template.php in WordPress before 2.6.1 do not force SSL communication in the intended situations, which might allow remote attackers to gain administrative access by sniffing the network for a cookie.
https://exchange.xforce.ibmcloud.com/vulnerabilities/44569
http://www.securityfocus.com/bid/30750
http://www.openwall.com/lists/oss-security/2008/08/20/3