When an attacker discovers a directory listing that includes eval-stdin.php , they don’t need to navigate the file—they can directly send a POST request to the script with malicious PHP code in the body.

When this file is accessible via a web browser (e.g., at ://yourdomain.com ), an attacker can send a with arbitrary PHP code in the body. The server will then execute that code immediately, giving the attacker full control over the application. How to Fix It

The issue was patched in April 2017. However, many production servers still run outdated dependencies, sometimes years later. The CVSS score is because: