An issue was discovered in SDCMS V1.7. In the \app\admin\controller\themecontroller.php file, the checkbad() function's filtering is not strict, resulting in PHP code execution. This occurs because some dangerous PHP functions (such as "eval") are blocked but others (such as "system") are not, and because ".php" is blocked but ".PHP" is not blocked.

There is a CSRF in SDCMS V1.7 via an m=admin&c=theme&a=edit request. It allows PHP code injection by providing a filename in the file parameter, and providing file content in the t2 parameter.