If you have discovered an "Index of" page or are seeing requests for eval-stdin.php in your server logs, your application is likely being scanned for a well-known vulnerability in older versions of PHPUnit . The Critical Flaw
, a popular testing framework used by developers to ensure their code works as expected. In older versions (specifically before
that remove development dependencies.
The eval-stdin.php file uses an insecure eval() function call that executes input received via php://stdin (intended for command-line use) but can be reached via HTTP POST requests in web-accessible environments. If you have discovered an "Index of" page
To understand how this simple file became a critical threat, you must first look at its intended purpose. Within PHPUnit, eval-stdin.php was designed as a helper script to execute PHP code passed to it through standard input ( stdin ). It is a utility for the testing environment, meant to allow PHPUnit to run child processes and evaluate the results.
If you are a PHP developer or system administrator checking server logs and see requests targeting vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php , you are likely witnessing a scan for .
The index of vendor phpunit phpunit src util php evalstdinphp work refers to a specific file path within a PHP project that utilizes PHPUnit for unit testing. PHPUnit is a popular testing framework for PHP, and it provides a lot of functionalities to write and execute tests. The eval-stdin
vendor/ phpunit/ phpunit/ src/ Framework/ Runner/ Util/ eval-stdin.php ... tests/ ...
The EvalStdin.php file is a utility script that allows for the evaluation of PHP code provided through standard input (STDIN). The primary purpose of this script is to facilitate the execution of PHP code snippets in a controlled environment. This can be particularly useful for testing and debugging purposes, as well as for executing PHP code from external sources.
Even if you remove the specific file, it is best practice to block public access to the entire vendor directory. It is a utility for the testing environment,
The path you provided, vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php , is a well-known vulnerability tracked as . It allows remote attackers to execute arbitrary code on your server by sending a specific HTTP POST request.
The Anatomy of an Exploit: Understanding vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php