Cross-site scripting (XSS) vulnerability in visitor/livesupport/chat.php in Scott Weedon Ajax Chat, possibly 0.1, allows remote attackers to inject arbitrary web script or HTML via the userid parameter.
Directory traversal vulnerability in includes/operator_chattranscript.php in Scott Weedon Ajax Chat, possibly 0.1, allows remote attackers to read arbitrary files via a .. (dot dot) in the chatid parameter.