1. Pre-Account Takeover
- How to Hunt:
- Register an email without verifying it.
- Register again using a different method (e.g., 'sign up with Google') with the same email.
- Check if the application links both accounts.
- Try logging in to see if you can access information from the other account.

2. Account Takeover due to Improper Rate Limiting
- How to Hunt:
- Capture the login request.
- Use tools like Burp Suite's Intruder to brute-force the login.
- Analyze the response and length to detect anomalies.

3. Account Takeover by Utilizing Sensitive Data Exposure
- How to Hunt:
- Pay attention to the request and response parts of the application.
- Look for exposed sensitive data like OTPs, hashes, or passwords.

4. Login Vulnerabilities
- Check for:
- Brute-force vulnerabilities.
- OAuth misconfigurations.
- OTP brute-forcing.
- JWT misconfigurations.
- SQL injection to bypass authentication.
- Proper validation of OTP or tokens.

5. Password Reset Vulnerabilities
- Check for:
- Brute-force vulnerabilities in password reset OTPs.
- Predictable tokens.
- JWT misconfigurations.
- IDOR vulnerabilities.
- Host header injection.
- Leaked tokens or OTPs in HTTP responses.
- Proper validation of OTP or tokens.
- HTTP parameter pollution (HPP).

6. XSS to Account Takeover
- How to Hunt:
- Try to exfiltrate cookies or auth tokens.
- Craft XSS payloads to change user email or password.

7. CSRF to Account Takeover
- Check for:
- Vulnerabilities in email update endpoints.
- Vulnerabilities in password change endpoints.

8. IDOR to Account Takeover
- Check for:

- Vulnerabilities in email update endpoints.
- Vulnerabilities in password change endpoints.
- Vulnerabilities in password reset endpoints.

9. Account Takeover by Response & Status Code Manipulation- How to Hunt:
- Look for vulnerabilities where manipulating response or status codes can lead to account takeover.

10. Account Takeover by Exploiting Weak Cryptography- Check for:
- Weak cryptographic implementations in password reset processes.

11. Password or Email Change Function- How to Hunt:
- If you see email parameters in password change requests, try changing your email to the victim's email.

12. Sign-Up Function- How to Hunt:
- Try signing up with the target email directly. - Use third-party sign-ups with phone numbers, then link the victim's email to your account.

13. Rest Token
- How to Hunt: - Try using your REST token with the target account.
- Brute 13. Rest Token- How to Hunt:
- Try using your REST token with the target account. - Brute force the REST token if it is numeric.
- Try to figure out how the tokens are generated. For example, check if they are generated based on timestamp, user ID, or email.

14. Host Header Injection- How to Hunt:
- Intercept the REST account request. - Change the Host header value from the target site to your own domain (e.g., `POST /PassRest HTTP/1.1 Host: Attacker.com`).

15. CORS Misconfiguration to Account Takeover
- How to Hunt: - Check if the application has CORS misconfigurations.
- If so, you might be able to steal sensitive information from the user to take over their account or make them change authentication information. - Refer to [CORS Bypass](https://book.hacktricks.xyz/pentesting-web/cors-bypass) for more details.

16. Account Takeover via Leaked Session Cookie
- How to Hunt: - Look for vulnerabilities where session cookies are leaked.
- Refer to [HackerOne Report 745324](https://hackerone.com/reports/745324) for more details.

17. HTTP Request Smuggling to ATO- How to Hunt:
- Look for HTTP request smuggling vulnerabilities.
- Refer to [HackerOne Reports 737140 and 740037](https://hackerone.com/reports/737140) and [HackerOne Report 740037](https://hackerone.com/reports/740037) for more details.

site:*.host.com ext:asp
site:*.host.com ext:jsp
site:*.host.com ext:aspx
site:*.host.com ext:jspx
site:*.host.com ext:do
site:*.host.com ext:action
site:*.host.com ext:php