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Security report for holidu.com.au

Holidu GmbH · Hospitality · Australia

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

75/100

Risk levelMedium

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

Holidu GmbH operates a comprehensive online platform specializing in holiday rentals, cottages, villas, and apartments primarily targeting European holidaymakers and international travelers. The website offers a wide selection of verified accommodations with features such as free cancellation, family-friendly and pet-friendly options, and various property views. The platform is positioned as a specialist in the holiday rental market with a strong presence across multiple countries through localized domains. Technically, the website employs modern web technologies including React and Tailwind CSS, integrates multiple analytics and advertising tools, and provides a mobile-optimized user experience. Security posture is solid with HTTPS enforcement, security headers, and cookie consent mechanisms, although there is room for improvement in explicit security policies and vulnerability disclosure. Overall, the domain registration is privacy-protected but managed by a reputable registrar consistent with the Australian domain space. The website is professional, trustworthy, and compliant with privacy regulations, making it a reliable platform for holiday accommodation bookings.

Scanned

NIS2 and GDPR posture

GDPR outside view
58/ 100 · Medium
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

4 findings rated critical or high. Fix these first.

  1. 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';…

  2. GDPR outside view

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

    • 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

  3. 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.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching holidu.com.au

This scan found 18 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.

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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

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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
72
Security headers
70
Email security
80
DNS health
70
Network security
100
GDPR outside view
58
Average
75

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 specialist holiday rental platform is supported by its extensive property listings and regional domain presence. The business model revolves around an online marketplace connecting travelers with property owners, generating revenue likely through commissions or listing fees. The platform targets families, pet owners, and travelers seeking verified and diverse accommodation options. The presence of a mobile app and integration with major advertising and analytics networks indicates a mature digital marketing strategy. The company maintains a consistent brand image and leverages trust signals such as free cancellation and star host badges to enhance credibility. While direct contact information is not prominently displayed, the privacy and cookie policies reflect compliance with GDPR and other privacy laws, supporting business credibility.

Security posture

The website demonstrates a good security posture with HTTPS enforced and several security-related HTTP headers present. The use of cookie consent banners and privacy policies indicates awareness of privacy compliance. However, the absence of a security.txt file, incident response contact information, and explicit security policy pages suggests areas for enhancement. No vulnerabilities or exposed sensitive data were detected in the analyzed content. The integration of third-party scripts and trackers is standard for such platforms but should be continuously monitored for security risks. Overall, the security maturity is good but could benefit from formalized vulnerability disclosure and incident response mechanisms.

Recommendations

  1. Implement a Content Security Policy (CSP) header to mitigate cross-site scripting risks.
  2. Publish a security.txt file to facilitate responsible vulnerability disclosure.
  3. Add dedicated pages or sections for security policies and incident response contacts.
  4. Include Data Protection Officer (DPO) contact information to enhance GDPR transparency.
  5. Regularly audit third-party scripts and trackers to minimize security and privacy risks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Holidu GmbH
Description
Huge selection of high-quality holiday rentals, holiday lettings, villas. Book verified accommodation at the best price with confidence. Holiday accommodation with pool, sea view, child-friendly, pet-friendly. Specialist for the most beautiful holiday regions in Europe.
Key services
Holiday rental search and booking, Verified accommodation listings, Mobile app for bookings, Property listing for partners
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Tailwind CSS, ThumbmarkJS fingerprinting, Google Tag Manager, Taboola, Bing Ads, Facebook Connect, Identity Digital Australia (domain registrar)
Frameworks
React
Platforms
Web
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

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

Analytics and tracking

Services
Google Analytics, Facebook Analytics, Bing UET
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Taboola, Bing Ads, Facebook Ads
Tracking pixels
Facebook Pixel, Bing UET
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and well-structured.
  2. Content is rich with holiday rental offers and detailed property listings.
  3. Strong focus on user privacy and cookie consent.
  4. No direct contact emails or phone numbers found on homepage; likely available on dedicated contact pages.
  5. Multiple language and regional versions of the site exist.
  6. Use of modern web technologies and tracking tools is evident.
  7. No signs of malicious or suspicious content.
  8. No WHOIS registrant details publicly available due to privacy protection.
Technical notes

Notes

The website is built using modern front-end technologies such as React and Tailwind CSS, ensuring a responsive and accessible user interface. It leverages multiple third-party services for analytics, advertising, and user tracking, including Google Analytics, Facebook Pixel, Bing UET, and Taboola. The site is optimized for mobile devices and includes performance optimizations like font preloading and asynchronous script loading. The HTML structure is semantically sound with appropriate meta tags for SEO and social media sharing. However, the hosting provider and CMS are not explicitly identified. Performance is moderate, with potential improvements in caching and resource optimization. Overall, the technical infrastructure supports a robust and scalable online booking platform.
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. 76/100Low26 findingsView report
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