osCommerce 2.3.4.1 Installer Unauthenticated Configuration File Injection PHP Code Execution
Published Jul 23, 2025
9.3
CRITICALCVSS 4.0
EPSS 4.15%
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
-
- Version 2.3.4.1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| osCommerce | Online Merchant | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS: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
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Jul 23, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 4.15% (0.04152) | 90.56th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.51% (0.03510) | 87.64th | v5 (v2026.06.15) |
| May 31, 2026 | 78.79% (0.78786) | 99.07th | v4 (v2025.03.14) |
| May 19, 2026 | 76.78% (0.76775) | 98.97th | v4 (v2025.03.14) |
| Mar 24, 2026 | 72.99% (0.72993) | 98.77th | v4 (v2025.03.14) |
| Mar 13, 2026 | 74.46% (0.74458) | 98.83th | v4 (v2025.03.14) |
| Mar 12, 2026 | 78.15% (0.78146) | 99.00th | v4 (v2025.03.14) |
| Dec 31, 2025 | 75.34% (0.75339) | 98.84th | v4 (v2025.03.14) |
| Dec 20, 2025 | 71.50% (0.71498) | 98.66th | v4 (v2025.03.14) |
| Dec 19, 2025 | 73.91% (0.73915) | 98.77th | v4 (v2025.03.14) |
| Nov 21, 2025 | 85.78% (0.85783) | 99.33th | v4 (v2025.03.14) |
| Nov 18, 2025 | 81.37% (0.81371) | 99.25th | v4 (v2025.03.14) |
| Oct 9, 2025 | 86.39% (0.86394) | 99.36th | v4 (v2025.03.14) |
| Oct 8, 2025 | 70.46% (0.70461) | 98.62th | v4 (v2025.03.14) |
| Jul 24, 2025 | 0.52% (0.00523) | 65.93th | v4 (v2025.03.14) |
References (4)
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/oscommerce_installer_unauth_code_exec.rb exploit
- https://www.exploit-db.com/exploits/44374 exploit
- https://www.oscommerce.com/ product
- https://www.vulncheck.com/advisories/oscommerce-installer-unauth-config-file-injection-php-code-execution third-party-advisory
Change history (0)
No recorded changes yet.