After doing some research, we have created a small list of websites that will help you to perform vulnerability research. Here it is,
1. Security Tracker
Security Tracker provides daily updating huge database to the users. It is really simple to use and effective. Anyone can search the site for latest vulnerability information listed under various categories. Best tool for security researchers.
Hackerstorm provides a vulnerability database tool, which allows users to get almost all the information about a particular vulnerability. Hackerstorm provides daily updates for free but source is available for those who wish to contribute and enhance the tool. Such huge data is provided by www.osvdb.org and its contributors.
Hackerwatch is not a vulnerability database, but it is a useful tool for every security researcher. It is mainly an online community where internet users can report and share information to block and identify security threats and unwanted traffic.