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SECURITY SCORE
Certificate Information
Subject
CN=clusterfuzz.com
Issuer
C=US, O=Google Trust Services, CN=WR3
Valid From
November 21, 2025
Valid Until
February 19, 2026
52 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
C6:FF:53:01:BC:B1:11:D3:66:EF:62:CC:49:C9:95:EF:E9:B3:4C:A2:4B:83:24:C0:C2:F2:36:B1:D3:31:F2:44
Alternative Names
Security Configuration
TLS Protocols
TLS 1.0
TLS 1.1
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
Warnings
- • TLS 1.1 is deprecated and should be disabled
- • TLS 1.0 is deprecated and should be disabled
HTTP Security Headers
Status
Strict-Transport-Security
Present
max-age=2592000; includeSubdomains
Content-Security-Policy
Basic
connect-src; default-src; font-src; +9 more
connect-src 'self' www.google-analytics.com securetoken.googleapis.com www.googleapis.com identitytoolkit.googleapis.com storage.googleapis.com; default-src 'none'; font-src 'self' fonts.gstatic.com data:; frame-src clusterfuzz.com; img-src 'self' www.google-analytics.com www.gstatic.com data:; manifest-src 'self' login.corp.google.com; object-src 'none'; report-uri /report-csp-failure; script-src www.google-analytics.com www.gstatic.com apis.google.com clusterfuzz.com 'unsafe-inline' 'unsafe-eval'; style-src fonts.googleapis.com www.gstatic.com 'unsafe-inline'; upgrade-insecure-requests; worker-src 'none';
X-Frame-Options
Excellent
deny
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
- • Consider adding Permissions-Policy to control browser features
CAA Records (Certificate Authority Authorization)
CAA Records
Not Configured
(Any CA can issue certificates)
CAA Issues
- • No CAA records configured - any CA can issue certificates
Recommendations
- • Implement CAA records to restrict which CAs can issue certificates for your domain
- • This adds an extra layer of security against unauthorized certificate issuance
- • Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
- • Consider adding 'iodef' record to receive security incident reports