The string you're referencing points to CVE-2017-9841 , a critical Remote Code Execution (RCE) vulnerability in

This file is part of PHPUnit's utility for running isolated tests. It is designed to be used via the Command Line Interface (CLI), not the web browser.

Securing your application against this vulnerability involves proactive maintenance and secure configuration. 1. Update PHPUnit

// Never do this with untrusted input $input = file_get_contents('php://stdin'); eval($input);

Look for POST requests to:

# 1. Remove the entire vendor directory rm -rf vendor/

can identify if this endpoint is publicly accessible on your domain. a specific server, or are you trying to if a site is currently vulnerable to this? CVE-2017-9841 Detail - NVD

?>

The problem lies within the eval-stdin.php file, located at the path:

Here is a simplified example of the patched code:

In the sprawling ecosystem of PHP dependencies, few files have a reputation as infamous as eval-stdin.php . Tucked deep within the phpunit/phpunit source tree ( src/Util/PHP/eval-stdin.php ), this small script became the epicenter of one of the most widely exploited remote code execution (RCE) vulnerabilities in modern web history: .

<?php eval('?>'.file_get_contents('php://input'));