## https://sploitus.com/exploit?id=9F7439CC-F9EC-5909-8B1B-20B0212B26E6
# CVE-2025-27515 Proof of Concept
A practical demonstration of **CVE-2025-27515**, a file upload validation bypass vulnerability in Laravel Framework (โค 12.0.0).
## Vulnerability Overview
**CVE-2025-27515** is a validation bypass that allows attackers to circumvent file upload restrictions when Laravel applications use wildcard validation patterns (`files.*`). The vulnerability enables uploading of malicious files by exploiting weaknesses in how Laravel processes array-based file uploads.
**Severity:** Medium/High
**CWE:** CWE-20 (Improper Input Validation)
### Attack Vector
The exploit uses a **polyglot JPEG+PHP file** that:
- Contains valid JPEG magic bytes (`FF D8 FF E0`) to bypass MIME type validation
- Includes embedded PHP code (``)
- Uses `.jpg` extension to pass file extension checks
## Quick Start
### Run the Vulnerable Application
```bash
php artisan serve
# Access at http://localhost:8000/upload
```
### Execute the Exploit
**Python version:**
```bash
pip3 install requests beautifulsoup4
python3 exploit.py http://localhost:8000
```
**Rust version:**
```bash
cd exploit-rs
cargo run --release http://localhost:8000
```
## โ ๏ธ Disclaimer
**FOR EDUCATIONAL AND AUTHORIZED SECURITY TESTING ONLY**
- This is an intentionally vulnerable environment
- Do not use in production systems
- Only test on systems you own or have explicit permission to test
- Unauthorized access to computer systems is illegal
## References
- [NVD - CVE-2025-27515](https://nvd.nist.gov/vuln/detail/CVE-2025-27515)
- [Laravel Security](https://laravel.com/docs/security)
- [OWASP File Upload Security](https://owasp.org/www-community/vulnerabilities/Unrestricted_File_Upload)
---
**By CatSec** | Cyber Security Research