Newer versions of PHPUnit (≥ 4.8.28 and ≥ 5.6.3) have removed this file entirely. However, many legacy applications or careless deployments still contain the vulnerable script.
<?php eval('?>'.file_get_contents('php://stdin'));
If your project absolutely requires PHPUnit on the server, ensure it is updated to a modern, supported version. The vulnerability affects older iterations (primarily PHPUnit 4.x, 5.x, and some early 6.x builds). Modern versions of PHPUnit have completely rewritten or removed this behavior to mitigate the flaw. Conclusion index of vendor phpunit phpunit src util php eval-stdin.php
The "Index of" part of the query targets web servers that have directory listing
Understanding the Vulnerability: PHPUnit RCE (CVE-2017-9841) Newer versions of PHPUnit (≥ 4
require 'vendor/autoload.php';
(inside .htaccess in the vendor/ directory): This script executes arbitrary PHP code passed to
echo "Options -Indexes" >> /var/www/html/.htaccess
This flaw allows unauthenticated attackers to execute arbitrary PHP code on a server.
This script executes arbitrary PHP code passed to it via HTTP POST requests without any authentication.