Lichess · Report #3068485
Direct IP Access to Website
Informativestatus
criticalseverity
95upvotes
11 Apr 2025disclosed
How it was found
Summary:
The website is accessible directly via its IP address (37.187.205.99), which may bypass domain-based security policies and expose potential misconfigurations.
Steps To Reproduce:
- Open a web browser and enter the IP address: http://37.187.205.99
- Observe that it loads the main website instead of rejecting the request or redirecting it to the proper domain.
Expected Result:
The server should block direct IP access or redirect it to the proper domain.
Actual Result:
The website is fully accessible via its IP address.
Impact
-
Domain-based security policies (CSP, HSTS, cookies, etc.) might not be enforced, leading to potential security bypasses.
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Possible certificate mismatch issues if HTTPS is used, making it easier for phishing attacks.
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Firewall/hosting misconfigurations could expose internal infrastructure.