CVE-2018-25114

osCommerce 2.3.4.1 Installer Unauthenticated Configuration File Injection PHP Code Execution

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

osCommerce · Online Merchant

CVSS v4.0 VULNCHECK

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS

4.47% chance of exploitation in the next 30 days, 91st percentile

Nuclei

critical · CWE-94

Published

2025-07-23

Updated

2026-04-07

Proof-of-concept exploits (2)

• https://www.exploit-db.com/exploits/44374
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/mul…

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2018/CVE-2018-25114.yaml

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/oscommerce_installer_…

References

• CVE Record
• NVD entry