Cross-site scripting (XSS) vulnerability in wp-admin/wp-blogs.php in Wordpress MU (WPMU) before 2.6 allows remote attackers to inject arbitrary web script or HTML via the (1) s and (2) ip_address parameters.
https://exchange.xforce.ibmcloud.com/vulnerabilities/45512
http://secunia.com/advisories/32060
http://lists.grok.org.uk/pipermail/full-disclosure/2008-September/064748.html