job/uploadfile_save.php in MetInfo through 5.3.17 blocks the .php extension but not related extensions, which might allow remote authenticated admins to execute arbitrary PHP code by uploading a .phtml file after certain actions involving admin/system/safe.php and job/cv.php.

MetInfo through 5.3.17 allows stored XSS via HTML Edit Mode.

MetInfo through 5.3.17 accepts the same CAPTCHA response for 120 seconds, which makes it easier for remote attackers to bypass intended challenge requirements by modifying the client-server data stream, as demonstrated by the login/findpass page.

There is URL Redirector Abuse in MetInfo through 5.3.17 via the gourl parameter to member/login.php.