Multiple PHP remote file inclusion vulnerabilities in Really Simple PHP and Ajax (RSPA) 2007-03-23 and earlier allow remote attackers to execute arbitrary PHP code via a URL in the (1) __IncludeFilePHPClass, (2) __ClassPath, and (3) __class parameters to (a) rspa/framework/Controller_v5.php, and (b) rspa/framework/Controller_v4.php.