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CVE-2025-34100 PoC — BuilderEngine 3.5.0 RCE via Unauthenticated Arbitrary File Upload

Source
Associated Vulnerability
Title:BuilderEngine 3.5.0 RCE via Unauthenticated Arbitrary File Upload (CVE-2025-34100)
Description:An unrestricted file upload vulnerability exists in BuilderEngine 3.5.0 via the integration of the elFinder 2.0 file manager and its use of the jQuery File Upload plugin. The plugin fails to properly validate or restrict file types or locations during upload operations, allowing an attacker to upload a malicious .php file and subsequently execute arbitrary PHP code on the server under the context of the web server process. While the root vulnerability lies within the jQuery File Upload component, BuilderEngine’s improper integration and lack of access controls expose this functionality to unauthenticated users, resulting in full remote code execution.
Description
Demo web server
Readme
# CVE-2025-34100-demo
Demo web server

> [!NOTE]
> Please note that this is just the PHP files for the website, to understand the CVE better and create a more effective PoC, visit https://nvd.nist.gov/vuln/detail/CVE-2025-34100
>
> These files will not cause the CVE, but rather are the entry point to exploit the CVE. The CVE is found in the CMS.


Please put the files like this:
```bash
/var/www/html/biteinstall/
├── index.php
├── pages
│   ├── about.php
│   ├── home.php
│   ├── refund.php
│   ├── shop.php
│   └── thankyou.php
└── photo
    ├── cheeseburger.jpg
    ├── cookie.jpg
    ├── pizza.jpg
    └── ramen.jpg
```
Ensure that in the refund.php file, the IP ADDRESS is correct!:
```php
<form method="post" action="http://[YOUR IP ADDRESS FOR YOUR MACHINE]:80/themes/dashboard/assets/plugins/jquery-file-upload/server/php/" enctype="multipart/form-data">
	<label>Attach a photo of your receipt</label><br>
	<input type="file" name="files[]" />
	<input type="submit" value="send" />
</form>
```



Wow, getting ideas for EH? Too bad, CVE is too old for you.
How about trying a buffer overflow? I heard that's good.
File Snapshot

[4.0K] /data/pocs/866cad908f0e8b49f8b2d38bda40db67d709a91f ├── [ 818] about.php ├── [2.2M] cheeseburger.jpg ├── [1.5M] cookie.jpg ├── [ 741] home.php ├── [707K] pizza.jpg ├── [2.1M] ramen.jpg ├── [1.2K] README.md ├── [ 783] refund.php ├── [1.4K] shop.php └── [ 413] thankyou.php 0 directories, 10 files
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