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CVE-2026-104909 — The Mang Board plugin for WordPress is vulnerable to Local File Inclusion in all versions…

Key facts

CVE-2026-104909 is a High (8.1) vulnerability: The Mang Board plugin for WordPress is vulnerable to Local File Inclusion in all versions…. This entry ships a detection-only PoC and a Docker test lab.
CVE CVE-2026-104909
Severity High (8.1)
Detection / prevention —
PoC poc.py
Source 2026/CVE-2026-104909/

Details

English | 한국어

Description

The Mang Board plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 2.4.3 via the '_type (e.g. foo_type)' parameter parameter. This makes it possible for unauthenticated attackers to include and execute arbitrary .php files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where .php file types can be uploaded and included. Exploitation is trivial via an unauthenticated POST to any page rendering a public [mb_board] shortcode, as no nonce or capability check is enforced on the shortcode render path; on servers with a standard PHP installation, pearcmd.php can be leveraged to write and then include an attacker-controlled payload file in a single request.

Vulnerability Details

Property Value
CVE ID CVE-2026-104909
Type RCE
CVSS Score 8.1

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-104909/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-2026-104909

# 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/mangboard/tags/2.4.3/includes/class.board.php#L175
  • https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/includes/class.store.php#L124
  • https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/includes/functions/func.board.php#L360
  • https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/mangboard.php#L181
  • https://plugins.trac.wordpress.org/changeset/3738898/mangboard/trunk/includes/functions/func.board.php
  • https://wordpress.org/plugins/mangboard/
  • https://www.wordfence.com/threat-intel/vulnerabilities/id/cbf1cbe0-4740-4d76-a3f5-7d2e1a64d4ee?source=cve

Generated by PoC Generator on 2026-10-14T18:04:31.3476407

Frequently asked questions

What is CVE-2026-104909?

CVE-2026-104909 is a High (8.1) vulnerability: The Mang Board plugin for WordPress is vulnerable to Local File Inclusion in all versions…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-104909?

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-2026-104909?

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.