Directory traversal vulnerability in actionadmin/paysubscriptions.php in Invision Power Board (IPB) 2.1.x and 2.0.x before 20060425 allows remote authenticated administrators to include and execute arbitrary local PHP files via a .. (dot dot) in the name parameter, preceded by enough backspace (%08) characters to erase the initial static portion of a filename.
Cross-site scripting (XSS) vulnerability in Invision Power Board 2.3.1 and earlier allows remote attackers to inject arbitrary web script or HTML via an IFRAME tag in the signature.