Sites dedicated to web applications security

• OWASP, Web application security portal
• Web application description -OWASP-
• Scoring of application vulnerabilities, NIST
• Application Security Industry Consortium
• Searchappsecurity, Web application security resource
• CGIsecurity, vendor neutral information resource

Vulnerabilities diffusion list

• Securityfocus, news and vulnerability database
• Forum of Incidents Response and Security Team

IT security websites

• CERT, Internet Security Expertise
• IT security general purpose website