Cross-site scripting (XSS) vulnerability in the Artist avenue (com_artistavenue) component for Joomla! and Mambo allows remote attackers to inject arbitrary web script or HTML via the Itemid parameter to index.php.
Improper Neutralization of Input During Web Page Generation The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.