PHPUnit is a development tool and should never exist on a live production server. Connect to your server via SSH. Navigate to your project root directory. Delete the PHPUnit folder inside your vendor directory: rm -rf vendor/phpunit/phpunit Use code with caution.
Security implications
curl -d "<?php system('id'); ?>" https://example.com/vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php
After cleanup, test again with curl to verify the script no longer responds. index of vendor phpunit phpunit src util php eval-stdin.php
The search term "index of vendor phpunit phpunit src util php eval-stdin.php" targets a critical security vulnerability in the PHPUnit testing framework.
PHPUnit is a unit testing framework for the PHP programming language. It is an instance of the xUnit architecture for unit testing frameworks. PHPUnit was written by Sebastian Bergmann and is now maintained by the PHPUnit Development Team.
index of vendor phpunit phpunit src util php eval-stdin.php PHPUnit is a development tool and should never
A typical automated attack looks like this:
Even if your application itself is secure, an outdated dependency with a known RCE can completely undermine your defenses. This is especially common in legacy applications, poorly managed shared hosting environments, or projects where composer install is run on production without the --no-dev flag.
How such exposure commonly happens
Attempting to exploit eval-stdin.php on a website you do not own is illegal (Computer Fraud and Abuse Act in the US, similar laws elsewhere). This article is for defensive education and authorized penetration testing only.
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The correct Composer workflow: