CVE-2026-15103 — The WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell plugin…¶
Key facts
CVE-2026-15103 is a High (8.8) vulnerability: The WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell plugin…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-15103 |
| Severity | High (8.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-15103/ |
Details¶
English | 한국어
Description¶
The WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell plugin for WordPress is vulnerable to Privilege Escalation via arbitrary option update in all versions up to, and including, 3.12.8. This is due to the update_settings() REST callback failing to validate the group_id path parameter against an allowlist of permitted option names before passing it directly to get_option() and update_option(), allowing the built-in wp_user_roles option — which satisfies the route's loose [\w-]+ regex — to be targeted. This makes it possible for authenticated attackers with the wpf_manage_funnels capability and above to elevate their privileges to administrator by writing a crafted role definition containing arbitrary capabilities into the wp_user_roles option, thereby granting any WordPress role full site administrator access. The wpf_manage_funnels capability is typically assigned to the Funnel Manager custom role created by the plugin, meaning this role is the minimum required to exploit the vulnerability.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-15103 |
| Type | RCE |
| CVSS Score | 8.8 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-15103/poc.py
Usage¶
# Run PoC against target
python3 poc.py --target <TARGET_URL>
# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>
⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.
Test Lab¶
This repository includes a Docker-based test environment with both vulnerable and patched applications.
Quick Start¶
# Clone and navigate to CVE directory
cd CVE-2026-15103
# Start both applications
docker-compose up -d
# Run tests
./run-tests.sh # Linux/Mac
./run-tests.ps1 # Windows PowerShell
Application Endpoints¶
| Application | URL | Status |
|---|---|---|
| Vulnerable App | http://localhost:8080 | Shows vulnerability |
| Patched App | http://localhost:8081 | Demonstrates fix |
Directory Structure¶
├── README.md # English documentation
├── README_KO.md # Korean documentation
├── poc.py # PoC detection script
├── docker-compose.yml # Container orchestration
├── run-tests.sh # Linux/Mac test runner
├── run-tests.ps1 # Windows test runner
├── vulnerable-app/ # Vulnerable version
│ ├── app.py
│ ├── Dockerfile
│ └── requirements.txt
└── patched-app/ # Fixed version
├── app.py
├── Dockerfile
└── requirements.txt
References¶
- https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.8/includes/core/rest-api/Controllers/class-settings-controller.php#L40
- https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.8/includes/core/rest-api/Controllers/class-settings-controller.php#L462
- https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.8/includes/core/rest-api/Controllers/class-settings-controller.php#L66
- https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.8/includes/utils/class-wpfnl-functions.php#L1216
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3607181%40wpfunnels&new=3607181%40wpfunnels
- https://www.wordfence.com/threat-intel/vulnerabilities/id/76ad6d21-f277-496f-aa6b-f9d5cb8a3801?source=cve
Generated by PoC Generator on 2026-07-16T19:33:35.282521835
Frequently asked questions¶
What is CVE-2026-15103?¶
CVE-2026-15103 is a High (8.8) vulnerability: The WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell plugin…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-15103?¶
Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.
How do I block or mitigate CVE-2026-15103?¶
Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.
For authorized security testing and research only. See the full source and NVD record.