Multiple open redirect vulnerabilities in Joomla! 1.5 before 1.5.7 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a "passed in" URL.
JRequest in Joomla! 1.5 before 1.5.7 does not sanitize variables that were set with JRequest::setVar, which allows remote attackers to conduct "variable injection" attacks and have unspecified other impact.