Features • Installation • Updating • First login • API documentation • Demo • Troubleshooting • Credits

• Generate simple and customizable XSS payloads with an easy-to-use payload generator
• Send notifications when a new XSS is caught using webhooks (Slack, Discord or automation format) and email
• The destination email or webhook can be configured globally and per client
• Multi-user with admin and low privilege users
• Multi factor authentication with TOTP
• Allows capture of cookies, local storage, session storage, and more
• Stores additional information about the XSS such as like HTTP headers, source IP address, timestamp, etc.
• Acts as a "catch-all" endpoint. Just send your data in the querystring (GET) or body (POST) to your client's URL and XSS Catcher will catch it!
• Leverages html2canvas and fingerprintjs
• Captures the full DOM so you can easily know where the payload triggered
• Allows you to add custom tags to your XSS to better categorize and search them.
• Allows you to run custom JavaScript code and capture the output.
• Support up to 5 API keys per user to automate advanced attack scenarios when combined with webhooks

The easiest way of running XSS Catcher is by using the Dockerhub image (you'll need Docker):

# Running the app by exposing it on port 8080
$ docker run -p 8080:80 daxhackerman/xss-catcher

# By default, the container has no persistence. If you need some, you can setup a volume
$ docker volume create xsscatcher-db
$ docker run -p 8080:80 -v xsscatcher-db:/var/lib/postgresql/14/main/ -d --name xsscatcher daxhackerman/xss-catcher

If you wish to build the image yourself, you'll need Git, and optionally make. From your command line:

# Clone this repository
$ git clone https://github.com/daxAKAhackerman/XSS-Catcher.git

# Go into the repository
$ cd XSS-Catcher

# All of the following commands are using make. If you are on a system where make is not available, simply have a look into the Makefile and manually run the required commands (under build, start or stop)

# If you've never run the application, build it
$ make

# Start the application. It will listen to port 8080.
$ make start

# Stop the application when you're done
$ make stop

# You can update the application when needed
$ git pull && make stop; make && make start

• Default credentials to connect to the Web interface are admin:xss
• Default Web port when run through the Makefile is 8080

The Postman collections can be found here: https://www.postman.com/maintenance-architect-74448403/workspace/xss-catcher

In order to avoid JavaScript mixed content errors when the XSS payload is triggered, it is highly recommended to put XSS Catcher behind a reverse proxy providing valid TLS certificates.

• Flask
• VueJS
• BootstrapVue
• FingerprintJS
• html2canvas
• vue-code-highlight
• vue-json-pretty

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. We assume no liability and are not responsible for any misuse or damage caused by this tool.

• Simple One Time Secret - Generate single use, expiring links to share sensitive information

GitHub @daxAKAhackerman