POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1 Host: target-website.com Content-Length: 32 Use code with caution.
CVE / references
The vulnerability exists in the file vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php . The contents of the file in vulnerable versions are minimal and look roughly like this:
— Block direct access to the /vendor directory: vendor phpunit phpunit src util php eval-stdin.php exploit
In a healthy software development lifecycle (SDLC), PHPUnit lives exclusively on a developer’s local machine or within a CI/CD pipeline (like Jenkins, GitLab CI, or GitHub Actions). It should be deployed to a public-facing web server.
You should block external web access to the entire vendor directory, as it contains sensitive package code that should only execute via the internal command-line interface (CLI). For Nginx: Add the following block to your server configuration file: location ~ /vendor/ deny all; return 404; Use code with caution. For Apache ( .htaccess ):
Ensure your web server configuration (e.g., .htaccess or Nginx config) explicitly denies public access to the /vendor directory. POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin
If you suspect exploitation, look for:
(Note: Alternate paths like /phpunit/src/Util/PHP/eval-stdin.php may also exist depending on the project structure.)
A: It can. Frameworks like Laravel and Symfony often require PHPUnit for testing. If you have deployed your application with the --dev Composer flag or if your vendor folder is web-accessible, your live site could be vulnerable. It should be deployed to a public-facing web server
— Testing frameworks, debug tools, and development utilities should never be accessible on live systems.
composer remove phpunit/phpunit --dev