[security vulnerability] Cross-Site Scripting (XSS) vulnerabilities

[GatekeeperBuster]

Recently, our team found a reflected cross-site scripting (XSS) vulnerability
The vulnerability logic is present in the file:
https://github.com/mariuz/firebirdwebadmin/blob/master/panels/tb_dropfields.php#L27

The echo directly outputs the parameter $_POST['drop_cols'] without any sanitization. This makes it susceptible to Cross-Site Scripting (XSS) attacks. As a result, attackers can exploit this vulnerability by injecting malicious html code with $_POST['drop_cols']

To fix this vulnerability, we recommend that developers implement properly sanitize (e.g., htmlspecialchars()) for user input before displaying it on the webpage.