Is oliver-lehne.de Safe? Security Analysis for Erfolgreicher Vermieten
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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
Erfolgreicher Vermieten is a specialized German consulting and coaching business focused on helping private and commercial vacation rental property owners optimize their rental operations. The company offers tailored coaching programs, professional web design, digital certification as a 'Qualitätsgastgeber Digital', and exclusive discounts on tools and services. The website is well-positioned as a leading agency in the vacation rental coaching niche in Germany, with over 15 years of experience and strong trust signals including video testimonials and Google reviews. Technically, the site is built on Webflow CMS, uses modern JavaScript libraries, integrates Matomo analytics for privacy-conscious tracking, and employs Google reCAPTCHA for form security. Cookie consent is managed via a German-compliant consent manager, ensuring GDPR compliance. Security posture is good with HTTPS and form protections, though explicit security headers are not visible. No critical vulnerabilities or suspicious content were detected. Overall, the site demonstrates a mature digital presence with excellent content quality and user experience, targeting vacation rental hosts seeking professional support and digital tools.
Detected Technologies
9 urgent findings need attention
1 critical · 8 high
- + 1 more findings in the full report below
Keep oliver-lehne.de 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
5 findings
60/100
GDPR Compliance
4 findings
40/100
NIS2 Compliance
9 findings
2/100
Email Security
4 findings
70/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
The business operates in the Real Estate and Hospitality sectors, focusing on vacation rental hosts in Germany. Its competitive advantage lies in its niche specialization, long-standing market presence, and comprehensive service offerings including coaching, certification, and digital marketing tools. Revenue streams likely include coaching fees, web design services, and affiliate partnerships with tool providers. The target customers are private and commercial vacation rental owners aiming to increase occupancy and profitability. The company maintains partnerships with certification bodies and booking platforms, enhancing its ecosystem. Growth indicators include a strong online presence, active content marketing via blogs and newsletters, and customer testimonials. Strategic observations suggest a focus on digital transformation and quality assurance in vacation rental management.
Security Posture Analysis
Comprehensive Security Assessment
The website exhibits a good security maturity level with enforced HTTPS, use of Google reCAPTCHA to prevent spam, and a comprehensive cookie consent mechanism aligned with GDPR. No exposed sensitive data or vulnerable libraries were found in the HTML content. However, the absence of explicit HTTP security headers such as Content Security Policy (CSP), HSTS, and X-Frame-Options indicates room for improvement. There is no published security policy or incident response contact information, which could be enhanced to improve transparency and readiness. The site does not provide a vulnerability disclosure policy or security.txt file, which are best practices for mature security postures. Overall, the security posture is solid for a small consulting business but could benefit from formalized policies and additional technical controls.
Strategic Recommendations
Priority Actions for Security Improvement
Implement HTTP security headers including CSP, HSTS, X-Frame-Options, and X-XSS-Protection to enhance browser security.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
Erfolgreicher Vermieten
Unterstützung für private und gewerbliche Gastgeber bei der Vermarktung und Organisation von Ferienimmobilien mit Coaching, Mustervorlagen, Tools und Zertifizierung.
excellent
consistent
Technical Stack
fast
excellent
good
good
Security Assessment
- HTTPS enforced (implied by canonical URL and Google reCAPTCHA usage)
- Use of Google reCAPTCHA for form spam protection
- Cookie consent with granular user control
- No exposed sensitive data found in HTML
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is professionally designed and well-structured.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing X-Content-Type-Options header
MEDIUMPrevents MIME type sniffing
Missing X-XSS-Protection header
MEDIUMLegacy XSS protection (deprecated but still recommended)
Missing Referrer-Policy header
LOWControls referrer information sent with requests
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
EU business without adequate privacy measures
CRITICALEU businesses are subject to strict GDPR requirements
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: energy, 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 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
SPF Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
SSL Certificate Expires Within 90 Days
MEDIUMSSL certificate expires in 38 days
Weak SSL Key Length
HIGHSSL certificate uses 256-bit key, which is considered weak
Partial SSL/TLS Assessment
LOWCompleted 2 of 4 security checks due to time constraints
Certificate Details
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
Domain Transfer Lock Not Enabled
MEDIUMDomain can be transferred without authorization
Domain Delete Lock Not Enabled
LOWDomain can be deleted without additional verification
No DMARC Record
MEDIUMDMARC policy not configured
Domain Registration Details
- •No domain protection locks enabled
DNS Records
DNSSEC Status
⚡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 oliver-lehne.de compare?
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🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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PDF Report & Export
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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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