If your server is flagging this or you've found this file exposed, take these steps immediately: CVE-2017-9841 Detail - NVD
Testing frameworks should never exist on a live production server.Update your deployment workflows to install dependencies without development tools: composer install --no-dev Use code with caution. 2. Delete the Vulnerable File Manually
Run this command inside your project directory to check your current PHPUnit version: composer show phpunit/phpunit Use code with caution. How to Fix and Secure Your Application 1. Update PHPUnit Immediately index of vendor phpunit phpunit src util php eval-stdin.php
Prevent future exposure by configuring your web server to show directory listings.
<?php eval('?>'.file_get_contents('php://stdin')); If your server is flagging this or you've
Add the following block to your server configuration: location ~ /vendor/ deny all; return 404; Use code with caution.
Or, better, delete the entire phpunit folder from the vendor/ directory if you don’t run unit tests in production: How to Fix and Secure Your Application 1
Concise detection checklist (copyable)
In a properly secured environment, the vendor/ folder should never be accessible from the public web. However, misconfigurations or legacy deployments sometimes expose these directories – and that’s where the trouble begins.