diferent security need for web site or web based application

There are big huge work in ahead of Web Application Security. Please check with some security Books.

Some web Application identified Vulnerabilities  are:
•   Input Validation
•   Authentication
•   Authorization
•   Configuration Management
•   Sensitive Data
•   Session Management
•   Cryptography
•   Parameter Manipulation
•   Exception Management
•   Auditing and Logging

Please read more about these points. If required then let me know. We deals in Web Application Security.