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Burp Extender

Burp Extender lets you extend the functionality of Burp Suite in numerous ways.

Extensions can be written in Java, Python or Ruby.

API documentation Writing your first Burp Suite extension
Sample extensions View community discussions about Extensibility
  1. Support Center
  2. BApp Store
  3. What-The-WAF


This extension adds a custom payload type to the Intruder tool, to help test for bypasses of Web Application Firewalls (WAFs).


  • In the "What the WAF" tab, configure details of the target application, and the payload lists you would like to use.
  • In Intruder, select the "Extension generated" payload type, and choose the "What the WAF" payload generator.
  • Launch the Intruder attack in the normal way.

More help is available within the "Readme" tab in the "What the WAF" tab.

Author Sina Hatef
Version 1.4 (beta)
Last updated 02 October 2014

You can install BApps directly within Burp, via the BApp Store feature in the Burp Extender tool. You can also download them from here, for offline installation into Burp.

You can view the source code for this BApp by visiting our GitHub page.
Follow @BApp_Store on Twitter to receive notifications of all BApp releases and updates.
Download BApp

Please note that extensions are written by third party users of Burp, and PortSwigger Web Security makes no warranty about their quality or usefulness for any particular purpose.

Go back to BappStore