phpdisk blind and front Desk of any user login vulnerability reference using the exp-bug warning-the black bar safety net

File plugins\phpdiskclient\passport.php $str = $SERVER'QUERYSTRING'; if$str parsestrbase64decode$str;// trigger function else exit'Error Param'; /$username = trimgpc'username','G',"; $password = trimgpc'password','G',"; $sign = trimgpc'sign','G',";/ if$sign!= strtouppermd5$action.$ username.$...