Is holidu.nl Safe? Security Analysis for Holidu GmbH
https://holidu.nlCheck if holidu.nl is a scam or legitimate. Free security scan and reviews.
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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
Holidu GmbH operates a leading European vacation rental search platform offering a wide selection of verified holiday homes, apartments, and villas. The website targets European travelers seeking family-friendly and pet-friendly accommodations with a strong emphasis on trust and convenience. Technically, the site employs modern web technologies including React and Tailwind CSS, with robust performance and mobile optimization. Security posture is strong with HTTPS, security headers, and secure forms, though explicit security policies and incident response contacts are not publicly disclosed. Privacy compliance is well addressed with comprehensive privacy and cookie policies and consent mechanisms. Overall, the site presents a professional, trustworthy, and user-friendly platform with a mature domain and consistent WHOIS data supporting legitimacy.
Detected Technologies
10 urgent findings need attention
1 critical · 9 high
- + 2 more findings in the full report below
Keep holidu.nl 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
3 findings
70/100
GDPR Compliance
4 findings
33/100
NIS2 Compliance
9 findings
2/100
Email Security
2 findings
80/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
Holidu is positioned as a major player in the European vacation rental market, leveraging a marketplace model aggregating listings from multiple sources. Its business model focuses on providing verified listings and a seamless booking experience. The company benefits from a broad geographic presence with sister sites in multiple countries, strong brand consistency, and trust signals such as free cancellation and app availability. The target customers are families and pet owners looking for quality vacation homes. The company appears well-established with a large user base and extensive marketing and advertising partnerships.
Security Posture Analysis
Comprehensive Security Assessment
The website demonstrates a mature security posture with enforced HTTPS, comprehensive security headers, and no visible vulnerabilities or exposed sensitive data. However, it lacks publicly available security policies, incident response contacts, and vulnerability disclosure mechanisms, which are recommended best practices for transparency and rapid incident handling. The use of fingerprinting technology (ThumbmarkJS) indicates advanced tracking capabilities, which should be balanced with privacy considerations. Overall, the security maturity is high but could be improved with explicit security governance disclosures.
Strategic Recommendations
Priority Actions for Security Improvement
Publish a dedicated security policy page outlining security practices and controls.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
Holidu GmbH
Enorme selectie van hoogwaardige vakantiehuizen, appartementen, villa’s met geverifieerde accommodatie tegen de beste prijs. Specialist voor de mooiste vakantieregio’s in Europa.
excellent
consistent
Technical Stack
fast
excellent
good
good
Security Assessment
- HTTPS enforced
- Security headers present
- No exposed sensitive data in HTML
- Secure forms with POST method
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
Weak Strict-Transport-Security configuration
LOWCurrent value: "max-age=15552000"
Missing Content-Security-Policy header
HIGHControls resources the browser is allowed to load
Missing Permissions-Policy header
MEDIUMControls browser features and APIs
👤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
Privacy policy may not be GDPR compliant
MEDIUMPrivacy policy lacks explicit GDPR compliance elements
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, banking, digital
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
No DMARC reporting
LOWDMARC aggregate reports not configured
No DKIM record found
MEDIUMDKIM adds cryptographic signatures to emails
SPF Details
DMARC Details
MTA-STS Details
🏆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
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs
SSL Certificate Expires Within 90 Days
MEDIUMSSL certificate expires in 89 days
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
Domain Transfer Lock Not Enabled
MEDIUMDomain can be transferred without authorization
Domain Delete Lock Not Enabled
LOWDomain can be deleted without additional verification
Domain Registration Details
- •No domain protection locks enabled
DNS Records
DNSSEC Status
DNS Performance
SPF Analysis
⚡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 holidu.nl compare?
See how holidu.nl 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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