What potential security risks are present in the PHP code snippet provided for updating user data?

The potential security risk present in the provided PHP code snippet is the vulnerability to SQL injection attacks. This is because the user input is directly concatenated into the SQL query without any sanitization or parameterization. To solve this issue, we should use prepared statements with parameterized queries to prevent SQL injection attacks. 

// Update user data with prepared statement
$stmt = $pdo->prepare("UPDATE users SET email = :email, password = :password WHERE id = :id");

$stmt->bindParam(':email', $email);
$stmt->bindParam(':password', $password);
$stmt->bindParam(':id', $id);

$stmt->execute();

Keywords

SQL injection cross-site scripting input validation prepared statements data sanitization

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