What are the potential pitfalls of using a free Pinnwand-Script without proper security measures in place?

Using a free Pinnwand-Script without proper security measures can leave your website vulnerable to various attacks such as SQL injection, cross-site scripting, and unauthorized access to sensitive data. To mitigate these risks, it is important to implement security measures such as input validation, parameterized queries, and proper user authentication. 

// Example of implementing input validation in PHP
$username = $_POST['username'];
if (!preg_match("/^[a-zA-Z0-9]*$/", $username)) {
    // Invalid username format
    die("Invalid username format");
}

Keywords

SQL injection Cross-site scripting (XSS) CSRF attacks Authentication vulnerabilities Data leakage

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