A simple messaging app that is purposely vulnerable. It should NOT be used in a production environment. Stickerz is used as a playground for the "penetrationt testing course" at the University of Applied Siences Ulm.
Stickers is based on Python 3/Flask, you can use a virtual environment to run it
# Install Python3/pip in a virtual environment "venv", this keeps your installation clean
virtualenv -p python3 venv
# Start the virtual environment
source venv/bin/active
# Install Flask
pip install flask
# run the application
python app.py
You can then access the application at TCP port 5000.
Stickers image by Frederik Danko, taken from Unsplash.