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Security report for holidu.com.au

Holidu GmbH · Hospitality · Australia

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

Security score

76/100

Risk levelLow

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

Holidu GmbH operates a professional online platform specializing in holiday rentals, cottages, villas, and apartments primarily targeting the Australian and European markets. The website offers a comprehensive selection of verified accommodations with features such as family-friendly, pet-friendly, and various amenities filters. The platform positions itself as a trusted specialist in holiday regions, providing users with confidence through free cancellation and star host badges. Technically, the website employs modern web technologies including React, Google Analytics, and Bing Ads for marketing and tracking. The site is well-optimized for mobile devices and demonstrates good SEO and accessibility practices. Performance is moderate with asynchronous loading of scripts and fonts. From a security perspective, the site enforces HTTPS and includes several security headers, though there is room for improvement by adding advanced headers like Content-Security-Policy. No vulnerabilities or exposed sensitive data were detected in the HTML content. Privacy compliance is strong with a clear cookie consent mechanism and a comprehensive privacy policy indicating GDPR adherence. Overall, the website presents a low risk with a high level of professionalism and trustworthiness. The lack of WHOIS data due to privacy protection is typical for commercial entities and does not detract from the site's legitimacy. Strategic recommendations include enhancing security headers, publishing incident response information, and adding a vulnerability disclosure policy to further strengthen trust and security posture.

Scanned

This is an earlier scan of holidu.com.au. View the latest report

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 17 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

€25per month

  • 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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Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
77
Security headers
70
Email security
80
DNS health
70
Network security
100
GDPR outside view
58
Average
76

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 GmbH is positioned as a leading holiday rental marketplace with a focus on verified listings and user trust signals such as star host badges and free cancellation. The business model revolves around connecting travelers with property owners and facilitating bookings. The platform targets families, pet owners, and travelers seeking specific amenities, indicating a segmented and user-centric approach. The presence of multiple country-specific domains suggests a broad geographic reach and localization strategy. Marketing efforts leverage major ad networks and tracking services, supporting a data-driven growth approach. The company operates in the hospitality and real estate sectors, with a large-scale online presence and a consistent brand identity.

Security posture

The website demonstrates a mature security posture with mandatory HTTPS, several security headers, and no visible exposure of sensitive information. The cookie consent mechanism and privacy policy reflect compliance with data protection regulations such as GDPR. However, the absence of a published security policy, incident response contacts, and vulnerability disclosure program indicates areas for improvement in transparency and readiness. The use of third-party analytics and advertising scripts introduces some tracking risks, but these are managed with user consent. Overall, the security maturity is good but could be enhanced by adopting additional best practices and formal policies.

Recommendations

  1. Implement Content-Security-Policy and other advanced security headers to mitigate XSS and data injection risks.
  2. Publish a dedicated security policy and incident response page to improve transparency and preparedness.
  3. Establish and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  4. Enhance contact information availability, including security and data protection officer contacts if applicable.
  5. Regularly audit third-party scripts and tracking tools to minimize privacy risks and maintain compliance.
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, Filters for amenities and preferences
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, React, Google Analytics, Google Tag Manager, Bing Ads, ThumbmarkJS
Frameworks
React
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Secure cookie consent mechanism

Analytics and tracking

Services
Google Analytics, Bing Ads
Tracking level
extensive
Privacy practices
good

Advertising

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

Site quality

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

Key observations

  1. Website is a professional holiday rental platform targeting Australian and European markets.
  2. Content is rich with listings, images, and user ratings.
  3. Strong cookie consent and privacy policy presence indicating GDPR compliance.
  4. No direct contact emails or phone numbers found on homepage HTML.
  5. Use of modern JavaScript frameworks and analytics tools.
  6. No signs of malware or phishing detected.
  7. WHOIS data is unavailable due to privacy or query failure.
Technical notes

Notes

The website uses a modern React-based frontend with asynchronous loading of fonts and scripts to optimize performance. It integrates multiple analytics and advertising platforms including Google Analytics, Bing Ads, Facebook Pixel, and Taboola. The site is mobile-optimized with responsive design and accessibility considerations. Meta tags and Open Graph data are well-implemented for SEO and social media sharing. No CMS is explicitly detected, suggesting a custom or proprietary solution. Hosting provider details are not evident from the HTML. Performance is moderate, with potential for improvement through further optimization of resource loading and caching strategies.
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. 75/100Medium27 findingsView report
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