Vendor Phpunit Phpunit Src Util Php Eval-stdin.php Exploit Work Official

System administrators and developers must audit their deployments to ensure that vendor/ directories are not publicly accessible, update PHPUnit to secure versions, and remove all testing frameworks from live servers. With an EPSS (Exploit Prediction Scoring System) score exceeding 94%, the likelihood of exploitation remains extremely high. Immediate action is the only defense against this persistent threat.

The /vendor/ directory must be publicly accessible from the web root. Affected Versions CVE-2017-9841 Detail - NVD vendor phpunit phpunit src util php eval-stdin.php exploit

In essence, this file says: "Dear internet, please send me any PHP code you like. I promise to run it immediately." update PHPUnit to secure versions