Multiple cross-site scripting (XSS) vulnerabilities in index.php for Invision Power Board (IPB) 2.0.3 and 2.1 Alpha 2 allows remote attackers to inject arbitrary web script or HTML via the (1) act, (2) Members, (3) calendar, or (4) HID parameters.
Cross-site scripting (XSS) vulnerability in index.php for Invision Power Board 1.3 final allows remote attackers to execute arbitrary script as other users via the (1) c, (2) f, (3) showtopic, (4) showuser, or (5) username parameters.
ipchat.php in Invision Power Board 1.1.1 allows remote attackers to execute arbitrary PHP code, if register_globals is enabled, by modifying the root_path parameter to reference a URL on a remote web server that contains the code.