Or the simple one‑liner with curl :
That’s it. The script reads whatever is sent to its standard input and passes it directly to eval() . In the context of a command‑line test environment, this is harmless (even useful) because it allows PHPUnit to evaluate code snippets from pipes or process substitution.
: Add a location block to deny access: location ~ /vendor/ deny all; . Or the simple one‑liner with curl : That’s it
Ensure the autoindex directive is disabled (this is the default behavior). autoindex off; Use code with caution. Summary Checklist for System Administrators Action Item Run composer install --no-dev Removes testing tools from production Disable Directory Indexing Prevents exposure via Google Dorks Block /vendor/ path in firewall Stops direct access attempts to libraries Run an external vulnerability scan Confirms the patch works from the outside
If you have found this file on your server, take these steps immediately: : Add a location block to deny access:
An attacker who can request eval‑stdin.php can send arbitrary PHP code through the request body (or via other input methods) and have it executed on the server – with the same privileges as the web server user.
This is a valid RCE finding.
The inclusion of the word in the search term suggests three possibilities:
This string is a common or log entry used to find or exploit a critical Remote Code Execution (RCE) vulnerability tracked as CVE-2017-9841 . It targets a specific file in the PHPUnit testing framework, eval-stdin.php , which was often accidentally left exposed in production environments. Understanding the Components Summary Checklist for System Administrators Action Item Run
In Nginx: