inc/function.php 72行
```php
function getip(){
if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
$ip = getenv("HTTP_CLIENT_IP");
else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))
$ip = getenv("HTTP_X_FORWARDED_FOR");
else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
$ip = getenv("REMOTE_ADDR");
else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
$ip = $_SERVER['REMOTE_ADDR'];
else
$ip = "unknown";
return($ip);
}
```
继续看 `user/logincheck.php` 第19行
```php
$ip=getip();
define('trytimes',5);//可尝试登录次数
define('jgsj',10*60);//间隔时间,秒
$sql="select * from zzcms_login_times where ip='$ip' and count>=".trytimes." and unix_timestamp()-unix_timestamp(sendtime)<".jgsj." ";
$rs = query($sql);
$row= num_rows($rs);
if ($row){
```
ip没有任何过滤 直接进入sql语句查询 导致 sql注入漏洞
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