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Security report for holidu.ca

Holidu GmbH · Hospitality · Canada

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

Security score

77/100

Risk levelLow

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

Holidu GmbH operates a professional online vacation rental platform targeting European and Canadian markets. The website offers a comprehensive selection of verified vacation homes, apartments, villas, and cottages, catering to families, pet owners, and general travelers. The platform emphasizes user trust through free cancellation policies, star host badges, and high user ratings. Technically, the site uses modern web technologies including React, integrates multiple analytics and advertising services, and provides a mobile app for enhanced user experience. Security posture is strong with HTTPS enforcement, security headers, and cookie consent mechanisms, although explicit security policies and incident response contacts are not publicly available. Overall, the website presents a trustworthy and mature digital presence suitable for its business domain.

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.ca

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

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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
72
Security headers
70
Email security
80
DNS health
80
Network security
100
GDPR outside view
58
Average
77

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 holds a strong market position as a specialist vacation rental marketplace with a broad international footprint, including localized domains for multiple European countries and Canada. Its business model revolves around aggregating vacation rental listings and facilitating bookings, generating revenue likely through commissions or referral fees. The company targets families, pet owners, and vacationers seeking verified and quality accommodations. The presence of a mobile app and partnerships with major ad networks and analytics providers indicates a mature digital marketing strategy. The lack of direct contact information on the main site suggests reliance on app or partner channels for customer engagement.

Security posture

The website demonstrates a solid security foundation with HTTPS, security headers, and cookie consent compliance. Use of fingerprinting technology (ThumbmarkJS) suggests proactive fraud detection measures. However, the absence of a published security policy, incident response plan, or vulnerability disclosure channel limits transparency. No vulnerabilities or exposed sensitive data were detected in the analyzed content. The site should consider publishing explicit security and incident response information to enhance trust and compliance.

Recommendations

  1. Publish a dedicated security policy and incident response page to improve transparency.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide clear contact channels for security incidents and data protection inquiries.
  4. Regularly audit third-party scripts and dependencies for security vulnerabilities.
  5. Enhance WHOIS data transparency if possible to improve domain trustworthiness.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Holidu GmbH
Description
Huge selection of high-quality vacation rentals, vacation apartments, 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 vacation regions in Europe.
Key services
Vacation rental search and booking, Verified accommodation listings, Mobile app for booking, Property listing for partners
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, ThumbmarkJS fingerprinting, Google Analytics, Google Tag Manager, Taboola, Bing Ads, Facebook Connect
Frameworks
React
Platforms
Web, Mobile app (iOS and Android)
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 fingerprinting for fraud detection
  • 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
ThumbmarkJS
Marketing tools
Facebook Connect
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 vacation rental platform with extensive listings and user-friendly search.
  2. Strong privacy and cookie policies with consent mechanisms are implemented.
  3. No direct contact emails or phone numbers found on the main page; contact likely via app or partner portals.
  4. Use of multiple third-party analytics and advertising services with tracking scripts.
  5. No WHOIS data available from CIRA WHOIS, indicating privacy protection or data unavailability.
  6. No security.txt or explicit vulnerability disclosure found.
  7. Mobile app presence indicated via meta tags and app store links.
  8. No signs of adult or NSFW content; content is family and pet friendly.
Technical notes

Notes

The website employs a modern JavaScript framework (likely React) with asynchronous script loading and font optimization techniques. It integrates multiple third-party services for analytics, advertising, and user tracking, including Google Analytics, Google Tag Manager, Taboola, Bing Ads, and Facebook Connect. The site is mobile-optimized with responsive design and accessibility considerations. Performance is moderate, with some heavy SVG graphics and multiple external resource calls. No CMS or hosting provider details were explicitly detected. The technical stack supports a scalable and user-friendly vacation rental platform but should monitor third-party dependencies for security and performance impacts.
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. 78/100Low24 findingsView report
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