Vendor Phpunit Phpunit Src Util Php Eval-stdin.php Exploit [top] May 2026

This is a report on the CVE-2017-9841 vulnerability, a critical remote code execution (RCE) flaw in the PHPUnit testing framework. National Institute of Standards and Technology (.gov) Vulnerability Overview Vulnerability Name : PHPUnit Remote Code Execution (RCE). CVE-2017-9841 9.8 Critical (CVSS v3.x). Target File vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php Technical Description The script eval-stdin.php was designed to read PHP code from standard input ( ) and execute it using . In misconfigured production environments where the

Log Analysis

Check your access logs for suspicious patterns. Look for POST requests to any path containing phpunit/src/Util/PHP/eval-stdin.php or eval-stdin.php. vendor phpunit phpunit src util php eval-stdin.php exploit

The Vulnerable Code Snippet

Let’s look at the actual source code of eval-stdin.php (simplified for clarity): This is a report on the CVE-2017-9841 vulnerability,

Part 5: The Fix – Eradication and Remediation

Discovering this file on production is a Code Red incident. Do not simply delete the file and move on; assume the attacker has already executed code. produce exact shell commands tailored to your server

Impact: If successfully exploited, this vulnerability could allow an attacker to execute arbitrary PHP code on the system, potentially leading to code execution, data breaches, or other malicious activities.

Appendix

Cause: The eval-stdin.php file was intended for internal testing but was accidentally included in production distributions. It takes input from stdin and executes it as PHP code.