Cross-site scripting (XSS) vulnerability in Roy Tanck tagcloud.swf, as used in the WP-Cumulus plugin before 1.23 for WordPress and the Joomulus module 2.0 and earlier for Joomla!, allows remote attackers to inject arbitrary web script or HTML via the tagcloud parameter in a tags action. Cross-site scripting (XSS) vulnerability in tagcloud.swf in the WP-Cumulus Plug-in before 1.23 for WordPress allows remote attackers to inject arbitrary web script or HTML via the tagcloud parameter.