Detect subdomain takeover vulnerabilities by checking if subdomains point to unclaimed third-party services. Essential for bug bounty hunting and security assessments.
Enter Domain or Subdomain
Bulk Subdomain Check
Takeover Analysis Results
Checking for subdomain takeover vulnerabilities...
Enter domains to check for takeover vulnerabilities...
Vulnerable Services Detected:
GitHub Pages
Detects unclaimed github.io subdomains
Heroku
Finds unregistered herokuapp.com applications
AWS S3
Identifies unclaimed S3 bucket subdomains
Netlify
Detects unclaimed netlify.app deployments
Vercel
Finds unregistered vercel.app projects
Azure
Identifies unclaimed Azure services
Shopify
Detects unclaimed myshopify.com stores
Custom Services
Checks for other third-party service patterns
Perfect for:
- Bug bounty hunting and vulnerability research
- Security assessments and penetration testing
- Infrastructure security audits
- Continuous monitoring of subdomain security
- DNS misconfiguration detection
- Third-party service security validation
What is Subdomain Takeover?
Subdomain takeover occurs when a subdomain points to a third-party service (like GitHub Pages, Heroku, etc.) that is no longer claimed. An attacker can register the service and control the subdomain, potentially leading to:
- Cookie hijacking and session theft
- Phishing attacks using trusted domains
- Malware distribution
- SEO poisoning and reputation damage
- Bypass of security controls