Vendor Phpunit Phpunit Src Util Php Eval-stdin.php Cve !!install!! Jun 2026

Or simply block access to the entire /vendor/ directory:

The script reads raw POST data from php://stdin , checks if it starts with <?php , and then executes everything after it. An attacker can exploit this by crafting a POST request:

If you are running a legacy system and are unsure if you are exposed, checking your composer.lock file for the affected PHPUnit versions is the best first step. Proactive Steps to Proceed:

When it comes to scripts like eval-stdin.php , which might use eval() or similar functions: vendor phpunit phpunit src util php eval-stdin.php cve

The vulnerability associated with vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php CVE-2017-9841 , a critical Remote Code Execution (RCE) National Institute of Standards and Technology (.gov) Core Vulnerability Details This flaw exists in the

In vulnerable versions of PHPUnit, the eval-stdin.php script was designed to process standard input data for test executions. However, the code originally accomplished this by evaluating raw input via the following implementation: eval('?>' . file_get_contents('php://input')); Use code with caution.

The vulnerability resides in the file vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php . This script was designed to allow PHPUnit to execute code passed through standard input (stdin) for internal testing purposes. Or simply block access to the entire /vendor/

Between 2017 and 2019, this vulnerability was a goldmine for attackers. Major incidents included:

to a patched version:

location ~ ^/vendor/ deny all; return 403; However, the code originally accomplished this by evaluating

A notable real-world impact was on using the Mailchimp and Mailchimp E-Commerce modules. These modules included PHPUnit as a dependency, making over 25,000 sites vulnerable. Attackers exploited the flaw to compromise these Drupal sites, leading Drupal to issue a public service announcement (PSA-2019-0904).

Update your web server configuration (Nginx or Apache) to block public access to the directory. Harden PHP: Disable dangerous functions (e.g., file to limit the impact if an RCE occurs. 4. Verification Security scanners like those from