SQL injection vulnerability in topic_post.php in XennoBB 2.2.1 and earlier allows remote attackers to execute arbitrary SQL commands via the icon_topic parameter.
Directory traversal vulnerability in the avatar_gallery action in profile.php in XennoBB 2.1.0 and earlier allows remote attackers to read arbitrary files via a .. (dot dot) in the category parameter.
Cross-site scripting (XSS) vulnerability in messages.php in XennoBB 1.0.5 and earlier allows remote attackers to inject arbitrary web script or HTML via the tid parameter.