Multiple cross-site scripting (XSS) vulnerabilities in index.php in IDevSpot PhpLinkExchange 1.01 allow remote attackers to inject arbitrary web script or HTML via the catid parameter in a (1) user_add, (2) recip, (3) tellafriend, or (4) contact action, or (5) in a request without an action; or (6) the id parameter in a tellafriend action.  NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.