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SECURITY SCORE
Certificate Information
Subject
CN=app.buildwithfern.com
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
November 11, 2025
Valid Until
February 09, 2026
37 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
9F:BA:1B:03:C7:FD:8B:80:57:64:28:EA:BD:36:C3:EE:BF:86:DE:4C:72:DE:C5:7E:C2:9E:E7:13:07:26:6E:0F
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
HTTP Security Headers
Status
Strict-Transport-Security
Excellent
max-age=63072000; includeSubDomains; preload
Content-Security-Policy
Basic
default-src; script-src; style-src; +8 more
default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https: blob:; style-src 'self' 'unsafe-inline' https:; img-src 'self' https: data: blob:; font-src 'self' https: data:; connect-src 'self' https: wss: ws: data: blob:; media-src 'self' https: data: blob:; object-src 'self' https: data: blob:; frame-src 'self' https: data: blob:; base-uri 'self'; form-action 'self' https:
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Present
camera=(), geolocation=()
Recommendations
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
CAA Records (Certificate Authority Authorization)
CAA Records
Configured
(Restricts certificate issuance)
Current Issuer
Authorized
(Matches CAA policy)
Authorized CAs
Recommendations
- • Consider using critical flag (flags=128) for stricter CAA enforcement
- • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
- • Consider adding 'issuewild' records to control wildcard certificate issuance