Multiple cross-site scripting (XSS) vulnerabilities in PHP-Nuke 6.0 to 7.3 allow remote attackers to inject arbitrary web script or HTML via the (1) eid parameter or (2) query parameter to the Encyclopedia module, (3) preview_review function in the Reviews module as demonstrated by the url, cover, rlanguage, and hits parameters, or (4) savecomment function in the Reviews module, as demonstrated using the uname parameter.  NOTE: the Faq/categories and Encyclopedia/ltr issues are already covered by CVE-2005-1023.