For more info:

 https://ctftime.org

 http://www.scriptjunkie.us/2014/03/ccdc-and-ctfs-addressing-the-criticisms/

Some types of vulnerabilities:

 http://www.websecurify.com/overview/vulnerabilities.html

 https://www.hackthissite.org/

  http://smashthestack.org/

 http://crackmes.de/

 http://www.net-force.nl/

 

The entire details for Pragyan CTF can be downloaded from here

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