Direct static code injection vulnerability in chat/login.php in Ultimate PHP Board (UPB) 2.0b1 and earlier allows remote attackers to inject arbitrary PHP code via the username parameter, which is injected into chat/text.php.
viewforum.php in Ultimate PHP Board (UPB) 1.8 through 1.9.6 allows remote attackers to obtain sensitive information via an invalid (1) id or possibly (2) postorder parameter, which reveals the path in an error message when a file can not be opened.