Cross-site scripting (XSS) vulnerability in the administrator panel in the com_users core component for Joomla! 1.5.x through 1.5.10 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/50924
http://www.vupen.com/english/advisories/2009/1497
http://secunia.com/advisories/35278
http://developer.joomla.org/security/news/295-20090601-core-comusers-xss.html