Navigate to your project root and check if vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php exists.

If your vendor folder is visible this way, it’s a double failure:

If you cannot move the vendor folder out of the web root immediately, block public HTTP access to it entirely. Create a .htaccess file inside the /vendor folder: Deny from all Use code with caution. Nginx: Add a location block to your site configuration: location /vendor/ deny all; return 404; Use code with caution. To help secure your environment, let me know: What web server you are running (Apache, Nginx, IIS)?

to clear any opcaches that might hold references.

This file is the central component of , a critical Remote Code Execution (RCE) vulnerability affecting PHPUnit versions prior to 5.6.3.

Attackers utilize this RCE to establish a foothold. Common payloads include:

Attackers use automated command-line tools like curl to find and exploit this file in seconds. A typical attack payload looks like this:

No. PHPUnit is a legitimate and essential tool for PHP development. It is only dangerous when its internal helper scripts are exposed to the public internet without proper access controls.

If you want, I can: