Section 6: Security implications of having "index of vendor" exposed. How to prevent directory indexing (disable in Apache/Nginx, using .htaccess, etc.)
An attacker does not need credentials or a valid user session to exploit this flaw. They simply send an directly to the exposed eval-stdin.php URI.
Put together, you are looking for a publicly accessible web directory containing: /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php Section 6: Security implications of having "index of
Despite CVE-2017-9841 being , hundreds of sites remain vulnerable because:
This script is designed to receive any code sent to it via PHP's standard input ( php://input —typically the body of an HTTP POST request) and execute it with eval() . eval() is a notoriously dangerous function in PHP, as it treats any string passed to it as executable PHP code. Put together, you are looking for a publicly
Prevent your web server from listing file directories to the public.
If you have a (like Cloudflare) active in front of your site. If you have a (like Cloudflare) active in front of your site
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The following blog post breaks down why this file is a security risk and how to secure your server.
This exposure is officially classified as , a "Code Injection" vulnerability with a critical CVSS v3 base score of 9.8 .