rss.php in UseBB before 1.0.11 does not properly handle forum configurations in which a user has the view permission but not the read permission, which allows remote attackers to bypass intended access restrictions by reading a forum feed in combination with a topic feed.
Cross-site scripting (XSS) vulnerability in UseBB before 0.7 allows remote attackers to inject arbitrary web script or HTML via the $_SERVER['PHP_SELF'] variable.
SQL injection vulnerability in UseBB 0.5.1 and earlier, when magic_quotes_gpc is disabled, allows remote attackers to execute arbitrary SQL commands via the search function.