CVE-2026-16142 — The TrueBooker plugin for WordPress is vulnerable to Account Takeover in all versions up…¶

Key facts

CVE-2026-16142 is a Critical (9.8) vulnerability: The TrueBooker plugin for WordPress is vulnerable to Account Takeover in all versions up…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-16142
Severity	Critical (9.8)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-16142/

Details¶

English | 한국어

Description¶

The TrueBooker plugin for WordPress is vulnerable to Account Takeover in all versions up to, and including, 1.2.6. This is due to the add_front_user_update() AJAX handler being registered for unauthenticated users and accepting an arbitrary truebooker_wp_user_id value, which is passed directly to wp_update_user() without verifying authentication or ownership. This makes it possible for unauthenticated attackers to change any WordPress user account email address, including an administrator, by submitting the target user ID and an attacker-controlled email address. An attacker can then use the native WordPress password reset flow to receive the reset link at the attacker-controlled email address and take over the account.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-16142
Type	IDOR
CVSS Score	9.8

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-16142/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-2026-16142

# 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/changeset/3640018/truebooker-appointment-booking
https://www.wordfence.com/threat-intel/vulnerabilities/id/f0d3f7cb-4974-4b0f-9658-1895e5966276?source=cve

Generated by PoC Generator on 2026-08-15T18:35:35.113907404

Frequently asked questions¶

What is CVE-2026-16142?¶

CVE-2026-16142 is a Critical (9.8) vulnerability: The TrueBooker plugin for WordPress is vulnerable to Account Takeover in all versions up…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-16142?¶

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-2026-16142?¶

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.