What’s Vulnerable › Vulnerabilities

CVE-2018-25114: osCommerce 2.3.4.1 Installer Unauthenticated Configuration File Injection PHP Code Execution

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-07-23 · updated 2026-06-17
• Weakness: CWE-94

Description

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.

Affected products

• osCommerce Online Merchant: 2.3.4.1

References

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/oscommerce_installer_unauth_code_exec.rb
• 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

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