They send a POST request with a malicious PHP payload in the body. For example:
They navigate to https://target.com/vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php . index of vendor phpunit phpunit src util php evalstdinphp
Never deploy your vendor folder blindly. Use composer install --no-dev for production. Remove phpunit from your live environment. And always, always turn off directory indexing. Your future self will thank you when your server isn't listed in Shodan as a victim of CVE-2017-9041. They send a POST request with a malicious
If you see this in your logs, you are under attack. If you see this in your search console, your server is compromised. The combination of a mutable eval statement, a test file in production, and directory indexing creates a perfect storm for system takeover. Use composer install --no-dev for production
If you find an index of listing for this directory, you have effectively found a direct entry point to execute arbitrary code on the server. What exactly does eval-stdin.php do? Let’s look at the source code that historically shipped with PHPUnit versions before 4.8.28 and 5.6.3:
intitle:"index of" "eval-stdin.php" intitle:"index of" "vendor/phpunit" "parent directory" "eval-stdin.php" Nuclei has a specific template for this vulnerability:
This keyword string resembles a path traversal or a misconfigured web server index. The article will address the security implications, the function of the specific file ( eval-stdin.php ), and how attackers search for these exposed directories. In the world of web application security and bug bounty hunting, unconventional search queries often lead to the most critical vulnerabilities. One such string that has gained notoriety is: "index of vendor phpunit phpunit src util php evalstdinphp" .