Testing a website for security requires a comprehensive set of test cases that cover various attack vectors and potential vulnerabilities. Here are some example test cases to consider:

1. Input Validation Test Cases:
   • Verify that user inputs are properly validated and sanitized to prevent SQL injection, XSS, and command injection attacks.
   • Test the website’s response to different types of input, including special characters, long strings, and unexpected data.
2. Authentication and Authorization Test Cases:
   • Attempt to log in with valid and invalid credentials to ensure the website handles authentication correctly.
   • Test password strength requirements and ensure they meet security standards.
   • Verify that session management mechanisms are effective, such as session timeouts, session termination on logout, and protection against session fixation attacks.
   • Test access controls by attempting to access unauthorized resources or perform actions without appropriate privileges.
3. Security Misconfiguration Test Cases:
   • Check for default account/passwords that should be disabled or changed.
   • Test for unnecessary open ports, services, or debugging features that may expose sensitive information or provide entry points for attackers.
   • Verify that security headers (e.g., Content Security Policy, X-XSS-Protection, X-Frame-Options) are properly implemented.
4. Error Handling and Logging Test Cases:
   • Submit invalid requests and verify that appropriate error messages are displayed without exposing sensitive information.
   • Test error conditions and ensure that they are logged properly without revealing system details or sensitive data.
5. Cross-Site Scripting (XSS) Test Cases:
   • Inject XSS payloads in user inputs, such as text fields, URLs, and form submissions, to ensure the website is not vulnerable.
   • Verify that the website properly sanitizes and encodes user-generated content to prevent XSS attacks.
6. SQL Injection Test Cases:
   • Inject SQL queries through user inputs and verify that the website handles them securely without executing unauthorized database commands.
   • Test different SQL injection techniques, such as UNION-based, error-based, or time-based injections.
7. Cross-Site Request Forgery (CSRF) Test Cases:
   • Create malicious requests and check if the website validates and verifies the integrity of requests to prevent CSRF attacks.
   • Verify that CSRF tokens are used and validated correctly for sensitive actions.
8. File Upload Test Cases:
   • Test file upload functionality by attempting to upload files with different formats and sizes.
   • Verify that the website properly validates and restricts file types, preventing the upload of malicious files.
9. Session Management Test Cases:
   • Test session fixation by verifying that session IDs are regenerated upon successful login.
   • Attempt to access authenticated pages without a valid session to ensure proper session management.
10. Server-Side Request Forgery (SSRF) Test Cases:
    • Inject malicious URLs in requests to test if the website is vulnerable to SSRF attacks.
    • Verify that the website properly validates and restricts user-supplied URLs.
11. Business Logic Flaw Test Cases: Test application workflows to ensure that business logic rules are correctly implemented, preventing unauthorized access or data manipulation.
12. Secure Communication Test Cases:
    • Check if sensitive information is transmitted securely over HTTPS with valid SSL/TLS certificates.
    • Verify the implementation of secure communication protocols and encryption algorithms.
13. Mobile-specific Security Test Cases: Test the website on mobile devices and verify if it is vulnerable to mobile-specific threats, such as insecure data storage, weak encryption, or unauthorized access to device features.
14. Third-Party Integration Test Cases:
    • Test the security of any third-party libraries, APIs, or plugins integrated into the website.
    • Ensure that these integrations follow secure coding practices and do not introduce vulnerabilities.

These are just sample website test cases, and the actual test suite should be tailored to the specific requirements and technologies used in the website. It’s essential to continuously update and expand the test cases as new vulnerabilities emerge and security standards evolve.