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 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.

MetInfo through 5.3.17 allows stored XSS via HTML Edit Mode.