An attacker can send:
You should never have the vendor folder exposed to the public. Moreover, development tools should not be in production.
If the response contains test , your server is vulnerable. vendor phpunit phpunit src util php eval-stdin.php cve
Because many modern PHP applications use Composer to manage dependencies, the vendor folder is often deployed to the web root. If the web server is misconfigured to allow public access to the /vendor directory, the vulnerability becomes remotely exploitable. The Attack Vector
For an attacker to leverage CVE-2017-9841, two conditions must be met: The website must use a vulnerable version of PHPUnit. An attacker can send: You should never have
The eval-stdin.php file is a part of PHPUnit, used in the context of testing PHP code. It's designed to facilitate testing by evaluating PHP code provided through standard input. However, like any code that executes user-supplied input, it poses a significant risk if not properly sanitized, as it could potentially be exploited to execute arbitrary code.
: The script lacked identity checks, login gates, or access rules. Anyone who could reach the file could run code through it. Because many modern PHP applications use Composer to
Old applications or those using outdated PHP frameworks (like older Laravel, Symfony, or WordPress plugins) that haven't updated their dependencies are highly vulnerable.
This report examines , a critical remote code execution (RCE) vulnerability in PHPUnit that remains one of the most frequently scanned vulnerabilities by threat actors, even years after its initial disclosure. Vulnerability Overview CVE ID : CVE-2017-9841
This includes all 5.x releases prior to 5.6.3. The issue was first introduced in version 4.8.19 (and 5.0.10) and remained present up to the patched releases. Patched versions include .