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CVE-2026-17123 — The Royal Elementor Addons plugin for WordPress is vulnerable to Server-Side Request…

Key facts

CVE-2026-17123 is a High (8.8) vulnerability: The Royal Elementor Addons plugin for WordPress is vulnerable to Server-Side Request…. This entry ships a detection-only PoC and a Docker test lab.
CVE CVE-2026-17123
Severity High (8.8)
Detection / prevention —
PoC poc.py
Source 2026/CVE-2026-17123/

Details

English | 한국어

Description

The Royal Elementor Addons plugin for WordPress is vulnerable to Server-Side Request Forgery in versions up to, and including, 1.7.1064 via the Form Builder widget's 'webhook_url' setting. The widget's render() method persists the attacker-controlled URL into the wpr_webhook_url_{widget_id} option on every render (including a Contributor previewing their own draft), and the wpr_form_builder_webhook AJAX handler — registered for both authenticated and unauthenticated callers — reads that option and dispatches the outbound request via the non-safe wp_remote_post(), with no host allowlist, no scheme restriction, and no private/loopback IP filter (the plugin's existing wpr_is_blocked_remote_host / wpr_is_private_or_local_ip helpers are not called on this path). This makes it possible for authenticated attackers, with Contributor-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

Vulnerability Details

Property Value
CVE ID CVE-2026-17123
Type SSRF
CVSS Score 8.8

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-17123/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-2026-17123

# 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/royal-elementor-addons/tags/1.7.1061/classes/modules/forms/wpr-send-webhook.php#L20
  • https://plugins.trac.wordpress.org/browser/royal-elementor-addons/tags/1.7.1061/classes/modules/forms/wpr-send-webhook.php#L56
  • https://plugins.trac.wordpress.org/browser/royal-elementor-addons/tags/1.7.1061/modules/form-builder/widgets/wpr-form-builder.php#L3788
  • https://plugins.trac.wordpress.org/browser/royal-elementor-addons/tags/1.7.1064/classes/modules/forms/wpr-send-webhook.php#L20
  • https://plugins.trac.wordpress.org/browser/royal-elementor-addons/tags/1.7.1064/classes/modules/forms/wpr-send-webhook.php#L56
  • https://plugins.trac.wordpress.org/browser/royal-elementor-addons/tags/1.7.1064/modules/form-builder/widgets/wpr-form-builder.php#L3788
  • https://www.wordfence.com/threat-intel/vulnerabilities/id/8810200b-e026-4258-86aa-5c1a200fcf9b?source=cve

Generated by PoC Generator on 2026-08-16T14:54:46.418383648

Frequently asked questions

What is CVE-2026-17123?

CVE-2026-17123 is a High (8.8) vulnerability: The Royal Elementor Addons plugin for WordPress is vulnerable to Server-Side Request…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-17123?

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-2026-17123?

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.