Commix-Testbed is a collection of vulnerable web applications designed to test command injection detection and exploitation capabilities. The testbed provides various real-world scenarios that contain command injection vulnerabilities across different attack vectors. The platform includes regular injection scenarios for standard command injection testing, cookie injection scenarios that target vulnerabilities in cookie handling, user-agent injection scenarios for testing HTTP header-based attacks, and referer injection scenarios for exploiting referer header vulnerabilities. Additionally, the testbed features weak filter scenarios that simulate inadequate input validation mechanisms commonly found in production environments. These scenarios allow security professionals to evaluate the effectiveness of automated tools and manual testing techniques for identifying command injection flaws. The tool is available as a Git repository for local installation or as a dockerized version for containerized deployment. It serves as a controlled environment for testing the commix tool's detection and exploitation capabilities against various command injection attack patterns.