OWASP Vicnum Project

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OWASP Vicnum Project

OWASP Vicnum Project is a collection of intentionally vulnerable web applications and will now includes an intentionally vulnerable web API.


“Flexible, realistic, vulnerable web applications useful to auditor’s honing their web application security skills”

They demonstrate common web application vulnerabilities such as SQL injection and cross site scripting.

Vicnum applications are commonly used in Capture the Flag exercises at security conferences.

See http://vicnum.ciphertechs.com/

Project Goal

  • Have fun and stimulate interest in the field
  • Test web application scanners
  • Test manual attack techniques
  • Test source code analysis tools
  • Look at the code that allows the vulnerabilities
  • Test web application firewalls
  • Examine evidence left by attacks
  • Learn how to test API's


OWASP Vicnum is free to use. It is licensed under the http://creativecommons.org/licenses/by-sa/3.0/ Creative Commons Attribution-ShareAlike 3.0 license], so you can copy, distribute and transmit the work, and you can adapt it, and use it commercially, but all provided that you attribute the work and if you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.

Where is Vicnum?

Vulnerable VM of some Vicnum applications is downloadable from sourceforge.

Since individual applications within the project are constantly being updated, not everything is on that VM. Individual components are either on sourceforge or on github.

Vicnum applications are also distributed as part of the Broken Web Application Project (see https://www.owasp.org/index.php/OWASP_Broken_Web_Applications_Project)

Vicnum applications are also typically available online at http://vicnum.ciphertechs.com



Project Leader

Mordecai Kraushar

Nicole Becher

Related Projects


Quick Downloads



News and Events

This project is sponsored by CipherTechs.



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Project Type Files CODE.jpg
Q1 Anything I need to set up vicnum?
There are help folder in the downloads and a pdf manual. Basically set up the database, make sure the apache modules are loaded and modify the http config file to find the perl code in the cgi-bin folder.
Q2 Is there a way to make the challenges harder or easier?
Sure. Some suggestions are in the help file, one of them of course is to delete the help file. You can also modify the backdoors, allow indexing of folders, or change the encoding of hidden fields.
Q3 Is there more to it than just technical challenges?
Absolutely. In hacking a web application looking at the nature of the app or examining the so-called business logic is always a good idea. So looking for the back doors and hidden files is definitely a goal here.


Vicnum is developed by a worldwide team of volunteers. The primary contributors to date have been:

  • Nicole Becher
  • Mordecai Kraushar


Vicnum has been demonstrated at many chapter events, many attendees have provided feedback afterwards. In particular a big shout out to Daniel Zabib and Albert Fong who helped customize Vicnum applications for the APPSECUSA conference.

The Vicnum Project is affiliated with the Brooklyn OWASP chapter.

As of February, the priorities are:

  • xxx
  • xxx
  • xxx

Involvement in the development and promotion of Vicnum is actively encouraged! You do not have to be a security expert in order to contribute. Some of the ways you can help:

  • xxx
  • xxx