Despite being discovered in 2017, this vulnerability remains highly active. Researchers have observed massive spikes in scanning activity for this path even in recent years. CVE-2017-9841 Detail - NVD 21-Oct-2025 —
The catastrophic security flaw is not in the code itself, but in its . The vulnerability CVE-2017-9841 (Medium severity, but widely exploited) arises when the vendor directory is placed inside the document root of a web server. index of vendor phpunit phpunit src util php evalstdinphp
testing framework designed to read PHP code from standard input and execute it. Affected Versions: PHPUnit versions before 5.x before 5.6.3 eval-stdin.php file does not require authentication and uses the php://input wrapper to execute POST data directly. It is typically exploited when the Despite being discovered in 2017, this vulnerability remains
If a server is misconfigured to show the contents of the vendor directory, it makes it trivial for automated bots to: Confirm that PHPUnit is installed. Locate the exact path to eval-stdin.php . Verify if the version installed is vulnerable. How to Secure Your Server It is typically exploited when the If a
Run composer install --no-dev to ensure development dependencies are removed.