Cross-site scripting (XSS) vulnerability in system/index.php in ExpressionEngine 1.6.4 through 1.6.6, and possibly earlier versions, allows remote attackers to inject arbitrary web script or HTML via the avatar parameter.
Cross-site scripting (XSS) vulnerability in index.php in ExpressionEngine 1.2.1 and earlier allows remote attackers to inject arbitrary web script or HTML via the URL parameter.
CRLF injection vulnerability in index.php in ExpressionEngine 1.2.1 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the URL parameter.