Is sonntag.group Safe? Security Analysis for SONNTAG GROUP
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Below Finance avg (78)
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SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
AI Summary
SONNTAG GROUP is a well-established German professional services group with over 45 years of experience, specializing in finance, tax, legal advisory, family office management, IT compliance, and auditing. The group operates multiple specialized subsidiaries and serves a broad business clientele including high net worth families and enterprises. The website reflects a professional and consistent brand image with good content quality and clear service offerings. Technically, the site uses modern frontend frameworks and libraries such as Bootstrap, jQuery, and Video.js, ensuring a responsive and visually appealing user experience. However, some technical aspects like security headers and cookie consent mechanisms are missing, which could be improved to enhance security and compliance. The WHOIS data is unavailable or privacy protected, which is common for professional firms in Germany due to GDPR, but limits transparency. Overall, the site is secure, professional, and trustworthy with room for improvement in security best practices and privacy disclosures.
Detected Technologies
11 urgent findings need attention
1 critical · 10 high
- + 3 more findings in the full report below
Keep sonntag.group under constant watch
Guard tracks your live infrastructure daily: certificate expiry, DNS & mail authentication drift, uptime changes, subdomain inventory, and unexpected tracker or content shifts. A full timeline captures every diff so you can prove remediation and spot regressions instantly.
Security drift alerts
Risk score drops, new high-severity issues, and header hardening gaps
Compliance watch
GDPR / NIS2 posture changes with governance evidence snapshots
Infrastructure surface
Unexpected open services, SSL expiry, DNS & email authentication changes
Content & tracker intelligence
Marketing tech shifts, analytics drift, and AI recommendation updates
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Security Headers
4 findings
65/100
GDPR Compliance
4 findings
53/100
NIS2 Compliance
9 findings
2/100
Email Security
6 findings
40/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
The company holds a strong market position in the German finance and consulting sector, leveraging a diversified business model with subsidiaries focused on tax/legal advisory, family office services, IT compliance, and auditing. The group targets business clients and wealthy families, emphasizing personalized and comprehensive advisory services. Growth is indicated by the number of employees (550) and multiple locations. The partnership ecosystem includes related domains and external auditing partners, enhancing service breadth. The business model relies on professional consulting fees and long-term client relationships. The website's digital presence supports brand consistency and client engagement but lacks direct contact details on the main site, possibly directing users to partner sites for inquiries.
Security Posture Analysis
Comprehensive Security Assessment
The website demonstrates a moderate security posture with HTTPS usage and no visible exposed sensitive data. However, the absence of security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces protection against common web attacks. No explicit incident response or security policies are published, and no vulnerability disclosure or security.txt files are present. The lack of a cookie consent mechanism may pose GDPR compliance risks. The use of FingerprintJS indicates some client identification efforts but no extensive tracking or analytics services are detected, which is positive for privacy. Overall, the security maturity is moderate but could be enhanced by implementing recommended headers, publishing security policies, and improving privacy controls.
Strategic Recommendations
Priority Actions for Security Improvement
Implement comprehensive HTTP security headers including CSP, HSTS, and X-Frame-Options to mitigate common web vulnerabilities.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
SONNTAG GROUP
SONNTAG GROUP is a multi-disciplinary advisory group with over 45 years of experience, offering services in finance, tax, legal, IT compliance, family office management, and auditing. They operate at four locations with approximately 550 employees, focusing on comprehensive client advisory.
good
consistent
Technical Stack
moderate
good
basic
basic
Security Assessment
- HTTPS usage implied by external CDN links (https)
- No visible exposed sensitive data in HTML
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is fully accessible with no blocking or WAF challenges.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Weak X-Frame-Options configuration
LOWCurrent value: "SAMEORIGIN, SAMEORIGIN"
Missing Content-Security-Policy header
HIGHControls resources the browser is allowed to load
Missing Permissions-Policy header
MEDIUMControls browser features and APIs
Sensitive data may be cached
LOWCache-Control header should include "no-store" for sensitive pages
👤GDPR Compliance
Privacy and data protection assessment under GDPR regulations.
GDPR Compliance
Privacy and data protection assessment
No Cookie Policy found
HIGHGDPR requires clear information about cookie usage
No Cookie Consent Banner found
HIGHGDPR requires explicit consent for non-essential cookies
No Data Protection Officer mentioned
LOWLarge organizations may need to designate a DPO under GDPR
Privacy policy may not be GDPR compliant
MEDIUMPrivacy policy lacks explicit GDPR compliance elements
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
HIGHNIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
MEDIUMNIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
HIGHNIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
HIGHNIS2 requires documented incident response and business continuity plans
No business continuity planning found
MEDIUMNIS2 emphasizes operational resilience and business continuity
No security contact information
HIGHNIS2 requires clear incident reporting channels
No vulnerability reporting mechanism
MEDIUMClear vulnerability reporting supports coordinated disclosure
No NIS2 reference found
LOWConsider explicitly mentioning NIS2 compliance efforts
Critical sector without clear security compliance
HIGHDetected sectors: transport, digital
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
No SPF record found
HIGHSPF helps prevent email spoofing
No DKIM record found
MEDIUMDKIM adds cryptographic signatures to emails
No BIMI Record
LOWBIMI displays brand logos in email clients
No MTA-STS Policy
MEDIUMMTA-STS enforces TLS for email delivery
No TLS-RPT Record
LOWTLS-RPT provides reporting for email TLS issues
No email authentication configured
CRITICALDomain is vulnerable to email spoofing
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Weak Protocols Supported
HIGHServer supports weak protocols: TLSv1.1
OCSP Stapling Not Enabled
LOWOCSP stapling improves performance and privacy
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs
Mixed Content Detected
MEDIUM2 resources loaded over insecure HTTP
Partial SSL/TLS Assessment
LOWCompleted 3 of 4 security checks due to time constraints
Protocol Support
OCSP Status
📊DNS Health
DNS configuration and security assessment.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
MEDIUMDNSSEC is not configured for this domain
CAA Records Not Configured
LOWCertificate Authority Authorization (CAA) records not found
No DMARC Record
MEDIUMDMARC policy not configured
DNS Records
DNSSEC Status
DNS Performance
⚡Network Security
Port scanning and network exposure analysis.
Network Security
Port scanning and network exposure analysis
Good Network Security Posture
LOWNo unnecessary services detected on common risky ports
How does sonntag.group compare?
See how sonntag.group stacks up against similar websites in the same industry.
🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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Marketing Intelligence
Contact emails, phone numbers & warm leads
Plan Comparison
| Feature | PDF Report | Marketing+ |
|---|---|---|
| Full security analysis | ||
| Professional PDF export | ||
| Email delivery | ||
| Lifetime access + unlock code | ||
| Contact emails & phones | — | |
| Marketing outreach data | — |
Already purchased?
Order summary
Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.
Secure payments processed via EveryPay. Prices in EUR; Incl. 21% VAT.
SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
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