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.
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.
SQL injection vulnerability in profile.php in XennoBB 2.1.0 and earlier allows remote authenticated users to execute arbitrary SQL commands via the (1) bday_day, (2) bday_month, and (3) bday_year parameters in the personal section.