What potential security risks are associated with the code snippet provided in the forum thread?

The code snippet provided in the forum thread is vulnerable to SQL injection attacks due to directly concatenating user input into the SQL query. To mitigate this risk, the code should use prepared statements with parameterized queries to safely handle user input. 

// Original vulnerable code snippet
$username = $_POST['username'];
$password = $_POST['password'];

$query = "SELECT * FROM users WHERE username='$username' AND password='$password'";
$result = mysqli_query($connection, $query);

// Fixed code snippet using prepared statements
$username = $_POST['username'];
$password = $_POST['password'];

$query = "SELECT * FROM users WHERE username=? AND password=?";
$stmt = mysqli_prepare($connection, $query);
mysqli_stmt_bind_param($stmt, "ss", $username, $password);
mysqli_stmt_execute($stmt);
$result = mysqli_stmt_get_result($stmt);

Keywords

SQL injection cross-site scripting input validation prepared statements security vulnerabilities

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