Python - CSS Injection (CSSI)
$ sudo docker pull blabla1337/owasp-skf-lab:cssi
$ sudo docker run -ti -p 127.0.0.1:5000:5000 blabla1337/owasp-skf-lab:cssi
Now that the app is running let's go hacking!
When we start the application we can see that there is a text box that allow you to write a color name.
We can write a color like:
And depending on the color that we chose, this will be the color in the text below:
If we check how the text that we wrote in the text box is later put into the code we can see:
If we try to insert a malicious code that we know it will be inserted in the source code, we can try something like this:
This code should show an alert box or pop up alerting the text "CSSI - XSS". If we check the website after sending the malicious request:
And goal achieved!