PHPUnit utilizes eval-stdin.php to facilitate code execution during automated testing processes. The script is designed to read PHP code directly from the standard input ( stdin ) and execute it using PHP's native eval() function.
A single POST request to eval‑stdin.php can lead to:
Similar dorks include:
The vulnerability resides in EvalStdin.php , a utility file used by PHPUnit to evaluate code during test execution. Due to a lack of input validation and access control, this file can be triggered directly via a web browser if the vendor directory is publicly accessible. Years after its disclosure, this vulnerability remains one of the most common vectors for automated botnet attacks, cryptocurrency miners, and ransomware deployment on poorly configured web servers.
To understand why this exact keyword is significant, it is necessary to examine the components making up the path: index of vendor phpunit phpunit src util php evalstdinphp
Run composer install --no-dev to ensure development dependencies are removed.
A primary indicator is if the vendor directory resides within a publicly accessible web folder, such as public_html , www , or htdocs . The correct practice is to place the entire vendor directory and other configuration files one level above the document root, making them inaccessible via a web browser. PHPUnit utilizes eval-stdin
<Directory "vendor/"> Require all denied </Directory>
Within older versions of PHPUnit, developers included a utility file located at: vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php Due to a lack of input validation and