Your vendor folder should never, ever be directly accessible by a web request. And your production server should never, ever see a --dev dependency.
Why? Because this seemingly obscure path within a developer-only testing framework is a . vendor phpunit phpunit src util php eval-stdin.php exploit
This article explores the technical mechanics of the exploit, why it lingers on production servers, how to weaponize it, and most importantly, how to eradicate it permanently. To understand the exploit, we must first understand the target. PHPUnit is the industry standard for unit testing in PHP. In a best-practice environment, Composer (PHP's package manager) installs PHPUnit under the vendor/ directory, specifically vendor/phpunit/phpunit/ . Your vendor folder should never, ever be directly
In the ecosystem of web application security, few vulnerabilities have caused as widespread, silent, and persistent damage as the PHPUnit eval-stdin Remote Code Execution (RCE) vulnerability (tracked as CVE-2017-9841 ). Because this seemingly obscure path within a developer-only