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Security report for holidu.fr

Holidu GmbH · Hospitality · France

Medium risk. 5 critical or high findings in GDPR outside view, SSL/TLS and 1 other check.

Security score

61/100

Risk levelMedium

0–100, higher is better. How it is calculated

Holidu GmbH operates a comprehensive vacation rental platform targeting European travelers seeking verified and affordable holiday homes, villas, and apartments. The website offers a wide range of accommodation types with features such as family-friendly and pet-friendly options, supported by a mobile app and extensive search capabilities. The company positions itself as a specialist in European vacation rentals with a strong brand presence across multiple localized domains. Technically, the website employs modern JavaScript frameworks, fingerprinting technologies, and integrates multiple analytics and advertising services, reflecting a mature digital infrastructure. Security posture is solid with HTTPS enforcement and standard security headers, though explicit security policies and incident response information are not publicly disclosed. Privacy compliance is well addressed with clear cookie consent and privacy policies aligned with GDPR requirements. Overall, the site is professional, trustworthy, and safe for general audiences, though WHOIS data is unavailable, limiting full domain trust analysis.

Scanned

NIS2 and GDPR posture

GDPR outside view
33/ 100 · High
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

5 findings rated critical or high. Fix these first.

  1. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  3. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

Need hands-on remediation? Email guard@offseq.com

Keep watching holidu.fr

This scan found 14 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
0
Security headers
70
Email security
80
DNS health
80
Network security
100
GDPR outside view
33
Average
61

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Holidu's market positioning as a European vacation rental specialist is supported by a broad portfolio of property types and localized websites. The business model centers on aggregating and verifying listings to provide consumers with confidence and competitive pricing. Revenue streams likely include commissions from bookings and partnerships with property owners and agencies. The target customer segments include families, pet owners, and travelers seeking diverse accommodation options. Growth indicators include mobile app availability and extensive marketing partnerships. The ecosystem includes multiple localized domains, indicating a broad geographic reach. Strategic observations suggest a focus on trust and user experience to differentiate in a competitive market.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and multiple security headers implemented. No exposed sensitive data or vulnerable libraries were detected in the analyzed content. However, the absence of a public security policy, incident response contacts, or vulnerability disclosure mechanisms indicates room for improvement in transparency and readiness. The use of third-party tracking and advertising scripts introduces potential privacy and security risks that should be regularly audited. Overall, the security maturity is good but could be enhanced by publishing explicit security governance documents and providing direct security contact channels.

Recommendations

  1. Publish a dedicated security policy and incident response page to improve transparency and user trust.
  2. Implement and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  3. Provide clear security contact information such as security@ or abuse@ email addresses.
  4. Regularly audit third-party scripts and tracking technologies to minimize privacy and security risks.
  5. Enhance data retention policy disclosures to align with GDPR and improve user confidence.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Holidu GmbH
Description
Large choix de locations et maisons de vacances, villas de qualité. Logements vérifiés au meilleur prix à réserver en toute confiance. Logements avec piscine, vue sur la mer, adaptés aux enfants et aux animaux. Spécialiste des plus belles régions de vacances en Europe.
Key services
Vacation rental search and booking, Verified listings, Mobile app for bookings
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, ThumbmarkJS fingerprinting, Google Tag Manager, Taboola, Bing Ads, Facebook Connect, CDN (jsdelivr.net), SVG graphics
Frameworks
React
Platforms
Web, iOS app, Android app
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of security headers
  • Cookie consent mechanism

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Taboola, Bing Ads, Facebook Ads
Tracking pixels
Taboola, Bing, Facebook Connect
Marketing tools
Taboola
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. WHOIS data is unavailable, indicating privacy protection or registry limitations.
  3. Strong privacy and cookie policies with consent mechanisms are present.
  4. No direct contact emails or phone numbers found in the visible content.
  5. Use of modern web technologies and tracking tools is evident.
  6. Business operates in hospitality and real estate sectors focused on vacation rentals.
  7. No security policy or incident response information publicly available.
  8. No vulnerability disclosure or security.txt found.
  9. Content is family-friendly and safe for general audiences.
Technical notes

Notes

The website uses a modern React-based frontend with asynchronous font loading and fingerprinting for enhanced user experience and analytics. Integration with Google Analytics, Tag Manager, Taboola, Bing, and Facebook indicates extensive marketing and tracking infrastructure. The site is mobile-optimized with responsive design and accessibility considerations. Performance is moderate, with some heavy SVG graphics and multiple external resources. No CMS was explicitly detected, suggesting a custom or proprietary platform. Hosting provider details are not evident from the content. Technical risks include reliance on multiple third-party scripts which require ongoing security monitoring.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Earlier scans of this domain

  1. 73/100Medium25 findingsView report
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