Ensure autoindex is set to off; in your configuration file. 4. Block Access via .htaccess
If you are running PHPUnit in a production environment, PHPUnit is a development tool and has no place on a live production server. index of vendor phpunit phpunit src util php evalstdinphp
This file was never intended for production use. It belongs to PHPUnit’s testing suite, designed to run unit tests locally on a developer’s machine. Ensure autoindex is set to off; in your configuration file
The appearance of "index of /vendor/phpunit/phpunit/src/util/php/eval-stdin.php" in search results or server logs is a major red flag for web administrators. This specific file path is associated with a critical remote code execution (RCE) vulnerability that allows attackers to take complete control of a web server. This file was never intended for production use
If you are using a version of PHPUnit prior to 4.8.28 or 5.x < 5.6.3, you must update immediately.