Cross-site scripting (XSS) vulnerability in wp-admin/vars.php in WordPress before 2.0.10 RC2, and before 2.1.3 RC2 in the 2.1 series, allows remote authenticated users with theme privileges to inject arbitrary web script or HTML via the PATH_INFO in the administration interface, related to loose regular expression processing of PHP_SELF.
http://www.vupen.com/english/advisories/2007/1005
http://www.securityfocus.com/bid/23027
http://www.debian.org/security/2007/dsa-1285
http://sla.ckers.org/forum/read.php?2%2C7935#msg-8006