What security measures should I implement for a new web application?

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Features and Functions

1. Knowledge file：wstg-v4.2.pdf
2. Knowledge file：OWASP Application Security Verification Standard 4.0.3-en.pdf
3. Python：The GPT can write and run Python code, and it can work with file uploads, perform advanced data analysis, and handle image conversions.
4. Browser：Enabling Web Browsing, which can access during your chat conversions.
5. File attachments：You can upload files to this GPT.

Prompt Starters

1. What are the top risks associated with web application security?
2. How do I test for SQL injection vulnerabilities?
3. Can you analyze this code for potential security flaws?
4. What security measures should I implement for a new web application?