| Part | Meaning | |------|---------| | index of | Directory listing (often from misconfigured Apache/nginx) | | vendor | Composer dependencies folder | | phpunit | PHPUnit testing framework | | phpunit/src | Source code of PHPUnit | | util | Utilities folder | | eval-stdin.php | A script that executes PHP code from standard input | | work | Intention – how this script functions |
Index of /vendor/phpunit/phpunit/src/Util/PHP/ [ICO] eval-stdin.php 2021-09-01 12:00 1.2K That “index of” page confirms the file exists and is accessible. | Part | Meaning | |------|---------| | index
find /var/www/html -name "eval-stdin.php" If found outside vendor (e.g., moved to web/ ), investigate immediately. Test if the file is reachable: moved to web/ )
If an attacker finds:
Put together, you are looking for a publicly accessible web directory containing: /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php In PHPUnit (versions 6.x to 9.x), the file eval-stdin.php serves a legitimate internal purpose: | Part | Meaning | |------|---------| | index
<?php eval('?>' . file_get_contents('php://stdin')); It reads raw PHP code from standard input ( php://stdin ) and executes it using eval() . This is used internally by PHPUnit when running isolated child processes for testing.