POC - Remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code - CVE-2025-3248

Overview

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.

Full POC

Read about it — CVE-2025-3248

Disclaimer: This Proof of Concept (POC) is made for educational and ethical testing purposes only. Usage of this tool for attacking targets without prior mutual consent is illegal. It is the end user’s responsibility to obey all applicable local, state, and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program.

Getting Started

Finding Targets

To find potential targets, use Fofa (similar to Shodan.io):

• Fofa Dork: "Langflow"`

Cloning the Repository

First, clone the repository:

git clone https://github.com/verylazytech/CVE-2025-3248

Run the Exploit:

python3 CVE-2025-3248.py <Target:port>  <cmd>