Submit #992655: KusalkaSilva Learning-Management-System ffeb873f8803f1e9664384ff75000c7da45466d2 SQL Injection

The affected component is `admin/login.php`. The administrator login endpoint interpolates `$_POST['username']` and `$_POST['password']` directly into the query that validates the `users` table:

```php
$username = $_POST['username'];
$password = $_POST['password'];
$query = mysql_query("SELECT * FROM users WHERE username='$username' AND password='$password'")or die(mysql_error());
$count = mysql_num_rows($query);
$row = mysql_fetch_array($query);
if ($count > 0){
$_SESSION['id']=$row['user_id'];
echo 'true';
mysql_query("insert into user_log (username,login_date,user_id)values('$username',NOW(),".$row['user_id'].")")or die(mysql_error());
}else{
echo 'false';
}
```

An unauthenticated attacker can send `' OR 1=1 LIMIT 1 -- -` as the username to match an arbitrary row of the `users` table, receive `true`, and obtain an authenticated administrator session (`$_SESSION['id']` = that user's id) without any password. The same injection point is also a general SQL injection primitive against the `capstone` database, and the shipped database dump `db/NSBM.sql` contains the default administrator account `('admin','admin')`, so an attacker who reaches the panel can log in with well-known credentials as well.

• Source: ⚠️ https://github.com/KusalkaSilva/Learning-Management-System/issues/2
• User: yinian328 (UID 101459)
• Submission: 09/20/2026 17:20 (16 days ago)
• Moderation: 10/06/2026 07:49 (16 days later)
• Status: Accepted
• VulDB entry: 413893 [Kusalkasilva Learning-Management-System up to ffeb873f8803f1e9664384ff75000c7da45466d2 Administrator Login Endpoint admin/login.php mysql_query username/password sql injection]
• Points: 20