The body of the POST request contains malicious PHP code, such as or commands to download a web shell.
A Google Dork like index of "vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php" targets a critical Remote Code Execution (RCE) vulnerability tracking as . Malicious actors use this exact search string to find exposed, unpatched PHPUnit source files on poorly configured web servers. When successfully exploited, this flaw allows attackers to run arbitrary PHP code on your server without any authentication. The Technical Root Cause
Because the file executes arbitrary code, an attacker can achieve complete system compromise. Potential impacts include:
Because CVE-2017-9841 is heavily automated by botnets, an exposed file has a high probability of having been targeted. Run these security checks immediately: index of vendor phpunit phpunit src util php eval-stdin.php
Ensure your server does not allow "Index of" views, which helps hide your directory structure from basic scanners. CVE-2017-9841 Detail - NVD
Your document root should point to a public/ or web/ directory that contains only entry point files (e.g., index.php , assets/ ). The vendor/ folder should live the document root. Example structure:
// Construct the command to run the test $command = "php $phpunitUtilPath $testFile"; The body of the POST request contains malicious
This line allows any remote attacker to send a HTTP POST request containing PHP code. If the payload begins with the
If successful, the server responds with something like uid=33(www-data) gid=33(www-data) .
How such exposure commonly happens
Malicious bots scan millions of IP addresses daily looking for the specific relative path: /vendor/phpunit/phpunit/src/util/php/eval-stdin.php 3. Payload Delivery
The danger stems from two factors:
The primary fix is to update PHPUnit to a patched version (4.8.28+ or 5.6.3+) via Composer. Run composer update phpunit/phpunit . When successfully exploited, this flaw allows attackers to
The issue was patched in April 2017. However, many production servers still run outdated dependencies, sometimes years later. The CVSS score is because: