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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

78/100

Risk levelLow

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

Holidu GmbH operates a professional online vacation rental marketplace specializing in high-quality vacation homes, cottages, villas, and apartments primarily targeting European and Canadian markets. The platform offers verified accommodation listings with filters for amenities such as pools, sea views, and family or pet friendliness, positioning itself as a trusted specialist in the vacation rental industry. The website demonstrates a mature digital presence with modern technologies including React, Tailwind CSS, and integration of major analytics and advertising platforms like Google Analytics, Bing Ads, and Taboola. Privacy and cookie policies are comprehensive and GDPR compliant, with clear consent mechanisms implemented. Security posture is strong with HTTPS enforced and standard security headers present, though there is room for improvement in publishing explicit security policies and vulnerability disclosure mechanisms. WHOIS data is privacy protected, which is typical for commercial entities, and does not detract from the overall legitimacy given the professional branding and trust signals. Overall, Holidu presents a secure, user-friendly, and trustworthy platform for vacation rental bookings.

Scanned

This is an earlier scan of holidu.ca. 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.ca

This scan found 16 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
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  • 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
80
Network security
100
GDPR outside view
58
Average
78

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 platform with a broad international footprint, including localized domains for multiple European countries and Canada. Its business model centers on aggregating and verifying vacation rental listings, providing a seamless booking experience with free cancellation options and trust indicators such as star host badges. The company leverages partnerships and localized sites to expand reach and cater to diverse customer segments. Revenue streams likely include commissions from bookings and advertising partnerships. The platform's integration with major ad networks and tracking services supports targeted marketing and retargeting efforts. Holidu's growth is supported by a consistent brand presence, high-quality content, and a focus on user experience, positioning it competitively in the hospitality sector.

Security posture

The website exhibits a solid security posture with mandatory HTTPS, appropriate cache and referrer policies, and no visible exposure of sensitive data. The presence of cookie consent banners and privacy policies indicates compliance with data protection regulations. However, the absence of a published security policy, incident response information, and vulnerability disclosure channels suggests areas for enhancement in transparency and readiness. The use of third-party scripts and tracking technologies introduces potential privacy and security considerations, but these are standard in the industry and managed via consent mechanisms. Overall, the security maturity is good, with recommendations to implement CSP headers and publish security-related policies to further strengthen trust and compliance.

Recommendations

  1. Implement and publish a Content Security Policy (CSP) header to mitigate cross-site scripting risks.
  2. Create and make publicly available a security policy and incident response page to enhance transparency.
  3. Establish a vulnerability disclosure program and publish a security.txt file to facilitate responsible reporting.
  4. Enhance visibility of official contact information for security and privacy concerns on the website.
  5. Regularly audit third-party scripts and tracking tools to ensure compliance with privacy regulations and minimize risk.
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, Filters for amenities and preferences (pool, sea view, child-friendly, pet-friendly)
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Tailwind CSS, Google Analytics, Google Tag Manager, Bing Ads (bat.bing.com), Taboola, ThumbmarkJS fingerprinting
Frameworks
React
Platforms
Web
Performance
moderate
Mobile
good
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 async loading for scripts

Analytics and tracking

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

Advertising

Ad networks
Bing Ads, Taboola
Tracking pixels
Bing Ads, Taboola, Facebook Connect
Marketing tools
ThumbmarkJS
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 no blocking or WAF challenges.
  2. Strong focus on vacation rental marketplace with extensive listings and filtering options.
  3. Comprehensive privacy and cookie policies with consent mechanisms implemented.
  4. No direct contact emails or phone numbers found on the homepage; contact info likely on dedicated pages.
  5. Use of modern web technologies and third-party analytics and advertising services.
  6. No security.txt or explicit vulnerability disclosure policy found.
  7. WHOIS data is privacy protected or unavailable, common for commercial entities.
  8. High-quality images and content with consistent branding and trust indicators.
Technical notes

Notes

The website is built using modern web technologies including React and Tailwind CSS, ensuring responsive and accessible design. It employs asynchronous loading of scripts to optimize performance and integrates multiple analytics and advertising services for marketing effectiveness. The site demonstrates good SEO practices with comprehensive meta tags and Open Graph data. Performance is moderate, with potential for improvement in load times and resource optimization. Accessibility features are present but could be further enhanced with ARIA roles and semantic HTML improvements. Hosting details are not explicitly identified, but the use of CDN services like jsDelivr and asset hosting on holidu.com suggests a robust infrastructure. Overall, the technical implementation supports a professional and scalable online 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. 77/100Low26 findingsView report
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