If you've been learning Ethical Hacking for a while, you've probably heard about Command Injection. It's one of the most dangerous vulnerabilities that can exist in a web application because it allows attackers to execute operating system commands on a vulnerable server. Testing websites manually can take a lot of time, and that's exactly where Commix comes in. Commix is an open source tool that automatically checks web applications for command injection vulnerabilities and helps security researchers understand how these attacks work.
Whether you're learning Web Security, practicing on CTF platforms, or building your own Pocket Pentesting setup in Termux, Commix is definitely a tool worth trying. In this tutorial, I'll show you how to install Commix in Termux, verify the installation, and explain some of the most useful commands you should know.
⚠️ Educational Purpose Only
This tutorial is only for educational purposes. Always use Commix on applications that you own or have permission to test. Never test random websites without authorization.
What is Commix?
Commix stands for Command Injection Exploiter. It is a Python based penetration testing tool that automates the process of detecting and testing command injection vulnerabilities.
Instead of manually trying different payloads, Commix performs most of the testing for you. This makes it a great tool for students, penetration testers, and bug bounty hunters who want to learn more about web application security. If you're just starting your cybersecurity journey, check out these 100 Reasons to Learn Ethical Hacking.
Install Commix in Termux
First of all, let's update our packages.
pkg update && pkg upgrade -y
If you're new to Termux, you may also want to learn the basic Termux commands before installing security tools.
Output
Reading package lists... Done
Building dependency tree... Done
All packages are up to date.
Now install Git and Python.
pkg install git python -y
If you haven't used Python before, check out our guide on learning Python programming in Termux.
Output
The following NEW packages will be installed:
git
python
After this operation, 65 MB of additional disk space will be used.
Setting up git...
Setting up python...
Now clone the official Commix repository.
git clone https://github.com/commixproject/commix.git
Output
Cloning into 'commix'...
remote: Enumerating objects...
Receiving objects: 100%
Resolving deltas: 100%
Move inside the directory.
cd commix
If you want a better way to browse project folders, try the Tree command or the Ranger File Manager.
Verify the installation.
python commix.py -h
Output
Usage: commix.py [options]
Options:
-h, --help
--version
--update
--wizard
...
If you see the help menu, congratulations! 🎉
Commix has been installed successfully.
Basic Commix Commands
Display the Help Menu
If you're new to Commix, the help menu is the best place to start.
python commix.py -h
Check the Installed Version
python commix.py --version
Example Output
Commix Version 4.x.x
Check for Updates
Before testing anything, it's always a good idea to update the tool.
python commix.py --update
Start Wizard Mode
If you're a beginner, Wizard Mode makes Commix much easier to use.
python commix.py --wizard
The wizard will guide you through the testing process step by step.
Enable Verbose Output
To see more detailed information while Commix is running:
python commix.py -v 3
Use a Random User Agent
Sometimes websites block unknown clients.
You can make Commix use a random browser User Agent.
python commix.py --random-agent
Automatically Accept Default Options
Instead of answering every prompt manually:
python commix.py --batch
Check Internet Connection
python commix.py --check-internet
Scan a Target URL
Now let's see how to test a target URL.
python commix.py -u https://example.com/page.php?id=1
Commix will analyze the supplied parameter and check whether it appears vulnerable to command injection.
⚠️ Replace the example URL with a website that you own or have permission to test.
Crawl a Website
If you don't know which pages contain parameters, Commix can crawl the website first.
python commix.py -u https://example.com --crawl=2
Use a Custom User Agent
python commix.py -u https://example.com/page.php?id=1 --user-agent="Mozilla/5.0"
Specify the HTTP Method
If the application uses POST requests instead of GET:
python commix.py -u https://example.com/page.php?id=1 --method=POST
Increase Testing Level
Higher levels perform more comprehensive testing.
python commix.py -u https://example.com/page.php?id=1 --level=3
Use a Proxy
If you're using tools like Wireshark or Burp Suite, route the traffic through a proxy.
python commix.py -u https://example.com/page.php?id=1 --proxy=http://127.0.0.1:8080
Common Error
Sometimes you may see the following message.
No parameter(s) found for testing
Don't panic 😄
This usually means the URL you're testing doesn't contain any parameters like ?id=1 or ?page=2.
Commix only works when there is user input that can potentially be tested. If you're testing a normal blog page or homepage, it probably won't find anything.
Conclusion
Commix is an excellent tool for anyone interested in Web Application Security and Command Injection testing. It automates many of the repetitive tasks, making it much easier to understand how these vulnerabilities work. If you're learning Ethical Hacking, I highly recommend experimenting with Commix on intentionally vulnerable labs like DVWA, OWASP Juice Shop, or your own test environment before trying more advanced targets. To build a complete testing toolkit, you should also learn Nmap, SQLMap, Dirb, and Wireshark, as they complement Commix perfectly during authorized security assessments. If you run most of your security tools from your computer, you can even use Termux from your Mac using SSH or access Termux from Windows. I hope this tutorial helped you install Commix and understand its basic commands. If you run into any issues during installation, feel free to leave a comment below and I'll do my best to help. Thanks for reading Guys. Stay Inspired and as always Stay Ethical. 👾
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