Cross-site scripting (XSS) vulnerability in index.php in Simple Machines Forum (SMF) allows remote attackers to inject arbitrary web script or HTML via a base64 encoded params value in the action parameter.
Cross-site scripting (XSS) vulnerability in Sources/Register.php in Simple Machine Forum (SMF) 1.0.6 allows remote attackers to inject arbitrary web script or HTML via the X-Forwarded-For HTTP header field.