| Part | Meaning | |------|---------| | index of | Directory listing (often from misconfigured Apache/nginx) | | vendor | Composer dependencies folder | | phpunit | PHPUnit testing framework | | phpunit/src | Source code of PHPUnit | | util | Utilities folder | | eval-stdin.php | A script that executes PHP code from standard input | | work | Intention – how this script functions |
Your web server configuration (Nginx or Apache) should prevent access to any files inside /vendor/ .
The combination of file_get_contents('php://input') and eval() forms a severe code injection vector. The stream wrapper php://input allows a PHP script to read raw data from an HTTP POST request body. When wrapped inside eval() , any valid PHP code transmitted in a POST payload is directly interpreted and executed by the server. How a Hacker Exploits It | Part | Meaning | |------|---------| | index
When a web server receives a request for a directory (like /vendor/ ) and cannot find a default index file (like index.html or index.php ), it can default to generating an automated HTML page listing every file and folder inside that directory.
Add this line to your main .htaccess file: Options -Indexes Use code with caution. When wrapped inside eval() , any valid PHP
Unauthenticated Remote Code Execution (RCE).
The server’s web root points directly to the project directory, allowing access to /vendor/ . Unauthenticated Remote Code Execution (RCE)
You can quickly check if your website is exposed by running a manual check or reviewing your files. 1. Manual URL Check