CVE-2018-25114

A remote code execution vulnerability exists within osCommerce Online Merchant version 2.3.4.1 due to insecure default configuration and missing authentication in the installer workflow. By default, the /install/ directory remains accessible after installation. An unauthenticated attacker can invoke install_4.php, submit crafted POST data, and inject arbitrary PHP code into the configure.php file. When the application later includes this file, the injected payload is executed, resulting in full server-side compromise.

Score

CVSS 4.0 9.3 Critical

Status

Deferred - disclosure@vulncheck.com

Published

2025-07-23

Last modified

2026-04-07

Weaknesses

CWE-434, CWE-94

Affected products

• Online Merchant (Oscommerce)

References

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/oscommerce_installer_u…
• https://www.exploit-db.com/exploits/44374
• https://www.oscommerce.com/
• https://www.vulncheck.com/advisories/oscommerce-installer-unauth-config-file-injection-php-code-execution