Is CVE-2017-9841 actively exploited?

Yes. CVE-2017-9841 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2017-9841 be exploited remotely?

The attack vector of CVE-2017-9841 has not been classified yet.

What is the CVSS score of CVE-2017-9841?

CVE-2017-9841 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2017-9841

HIGHCISA KEVIN THE WILD

CVE-2017-9841

Published: February 15, 2022

EPSS:94.21%probability of exploitation in 30 daysPercentile:99.9th

Official Description

PHPUnit allows remote attackers to execute arbitrary PHP code via HTTP POST data beginning with a "<?php " substring, as demonstrated by an attack on a site with an exposed /vendor folder, i.e., external access to the /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php URI.

NVD Source

CISA KEV Advisory

PHPUnit Command Injection Vulnerability

Added to KEV: 2022-02-15Federal patch deadline: 2022-08-15

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

PHPUnit is vulnerable to remote code execution, allowing attackers to run arbitrary PHP code via specific HTTP POST data when the /vendor folder is exposed. Its high EPSS score of 0.94210 and inclusion in the KEV confirm its urgency and high likelihood of exploitation.

This vulnerability is actively exploited in the wild. The flaw is remotely exploitable via HTTP POST data if the /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php URI is externally accessible.

Recommended Action

Restrict external access to the /vendor folder, especially the /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php URI. Apply any available patches or updates for PHPUnit to address this remote code execution vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2017-9841 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2017-9841 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.