XanXSS : A Simple XSS Finding Tool

XanXSS is a reflected XSS searching tool (DOM coming soon) that creates payloads based from templates. Unlike other XSS scanners that just run through a list of payloads. XanXSS tries to make the payload unidentifiable, for example:

<xAnXSS</TitLE></STYLE><SVG/ONload=’alERt(1);’/></XaNxSs</titLe></StYlE><SvG/ONlOAD=’alerT(1);’/> <ifrAmE Src= [2].Find(CoNfirm);= “JAVaScRIpT:proMpT(1))”javAscrIpt:/*–></scRIPt> />cLIcK Me!</b</TextaRea></TiTLE><BUTtON ONcLIck=’aleRT(1);’/>XaNxss</TEXTaRea> <iMG sRc=%0acONfIRM();=+’jAVASCRiPT:alerT(“XSS”);'</STYlE><Svg/onLoad=’alErT((1));’/>

With XanXSS every payload is different. XanXSS works by running through the payloads until a specified number is found or a timer hits the max time, this prevents it from looping for to long. Some of the features included in XanXSS:

  • Ability to pass your own headers using -H
  • Ability to generate a polyglot script using -P
  • Ability to run behind a proxy using --proxy
  • And many more

Also Read – ISeeYou : Tool To Get Exact Location of The Users During Social Engineering or Phishing Engagements

Proof of Concept

For this proof of concept we will use https://xss-game.appspot.com/level1/frame

Now lets check those scripts in the HTML of the website:


XanXSS comes complete with the ability to use a proxy, is compatible with proxychains, and allows you to add custom headers. I have provided a full list of options for your convience:

usage: xanxss.py [-h] [-u http://test.com/test.php?id=] [-a VERIFY]
[-f AMOUNT] [-t TIME] [-p SCRIPT, [SCRIPT, …]]
[-F FILE-PATH] [-v] [–proxy TYPE://IP:PORT]
[-H HEADER=VALUE,HEADER:VALUE] [–throttle TIME secs] [-P]

optional arguments:
-h, –help show this help message and exit
-u http://test.com/test.php?id=, –url http://test.com/test.php?id=
pass a URL to test for XSS vulnerabilities. it is
recommended that you use a URL with a query parameter
-a VERIFY, –amount VERIFY
how many verifications steps to be taken, this will
determine how reliable the payload is. the more
verification steps the more reliable the payload will
be (default=5)
-f AMOUNT, –find AMOUNT Attempt to find this amount of working payloads, specifying this does not guarantee you will find this amount of working payloads (default=25)
-t TIME, –time TIME amount of time in seconds to spend on testing, this
will be used as a timer for the verification
-p SCRIPT, [SCRIPT, …], –payloads SCRIPT, [SCRIPT, …] pass a comma separated list of your own payloads, must contain at least 5 payloads
-F FILE-PATH, –file FILE-PATH pass a textual file containing payloads one per line, must contain at least 5 payloads
-v, –verbose run in verbose mode and display more output (default=False)
–proxy TYPE://IP:PORT
pass a proxy in the format type://ip:port
add your own custom headers to the request
–throttle TIME (secs) throttle each request with a sleep time (default=0)
-P, –polyglot generate a polyglot script to append to the end of the
running scripts, if there is XSS this should find it