Cross-site scripting (XSS) vulnerability in the self_link function in in the RSS Feed Generator (wp-includes/feed.php) for WordPress before 2.6.5 allows remote attackers to inject arbitrary web script or HTML via the Host header (HTTP_HOST variable).
https://www.redhat.com/archives/fedora-package-announce/2008-December/msg00176.html
https://www.redhat.com/archives/fedora-package-announce/2008-December/msg00000.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/46882
http://www.securityfocus.com/bid/32476
http://wordpress.org/development/2008/11/wordpress-265/
http://securityreason.com/securityalert/4662
http://secunia.com/advisories/32966