Open
Cached
·
just now
90/100
SECURITY SCORE
Certificate Information
Subject
CN=auth.sumup.com
Issuer
C=US, O=Google Trust Services, CN=WE1
Valid From
December 04, 2025
Valid Until
March 04, 2026
44 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA256
SHA-256 Fingerprint
7D:7B:DA:C7:FD:53:87:2A:EF:28:DB:3E:8D:D0:54:2E:2C:63:2A:8D:91:B7:7A:C8:E1:47:E9:B2:0A:26:C3:CE
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
Good
default-src; style-src; font-src; +4 more
default-src 'none'; style-src 'self' 'unsafe-inline'; font-src https://static.sumup.com; script-src 'strict-dynamic' 'nonce-YzBkYzk4MWYtZTBjYy00NzUzLTgzOGUtOTRlYWFiY2JiY2Nl' 'self' data: 'unsafe-inline' https://static.sumup.com https://static.cloudflareinsights.com https://challenges.cloudflare.com; img-src 'self' 'unsafe-inline' data: https://static.sumup.com https://circuit.sumup.com https://s3-sa-east-1.amazonaws.com; connect-src 'self' *.monitoring.sumup.net *.sumup.com https://status.sumup.com https://cloudflareinsights.com; frame-src https://store.sumup.com/ https://challenges.cloudflare.com;
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
- • Strengthen CSP by removing 'unsafe-eval'
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
- • 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