What is the potential issue with the user registration script provided in the forum thread?

The potential issue with the user registration script is that it is vulnerable to SQL injection attacks as it directly inserts user input into the SQL query without sanitizing it. To solve this issue, we should use prepared statements with parameterized queries to prevent SQL injection. 

// Fix for user registration script using prepared statements
// Assuming $conn is the database connection object

$username = $_POST['username'];
$password = $_POST['password'];

$stmt = $conn->prepare("INSERT INTO users (username, password) VALUES (?, ?)");
$stmt->bind_param("ss", $username, $password);

$stmt->execute();

$stmt->close();
$conn->close();

Keywords

SQL injection password hashing validation prepared statements user authentication

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