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Security report for holidu.ie

Holidu GmbH · Hospitality · Ireland

Medium risk. 5 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

73/100

Risk levelMedium

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

Holidu.ie is a professional online platform specializing in holiday lettings, cottages, villas, and apartments primarily across Europe. The company, Holidu GmbH, offers a comprehensive marketplace for vacation rentals with a focus on verified accommodations and user-friendly booking experiences. The website targets holiday travelers seeking family-friendly, pet-friendly, and scenic holiday homes. Technically, the site employs modern web technologies including React and integrates multiple analytics and advertising services such as Google Analytics, Taboola, and Facebook Connect. The site is well-optimized for mobile and SEO, providing a smooth user experience. Security posture is strong with HTTPS enforced and standard security headers present, though additional headers like CSP could enhance protection. Privacy compliance is robust with clear privacy and cookie policies and consent mechanisms in place. However, explicit contact information and security incident response policies are not readily found on the site. Overall, the domain WHOIS data is privacy protected, which is common and justified for commercial entities. The website is trustworthy, professional, and well-positioned in the European holiday rental market.

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. 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';…

  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.ie

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

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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
77
Security headers
70
Email security
80
DNS health
80
Network security
100
GDPR outside view
33
Average
73

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 operates as a large-scale online marketplace in the hospitality and real estate sectors, focusing on vacation rentals. Its business model revolves around aggregating verified holiday homes and facilitating bookings, targeting families, pet owners, and travelers seeking specific amenities. The company maintains a strong presence across multiple European countries through localized partner domains. Revenue streams likely include commissions from bookings and partnerships with property owners. The platform's competitive advantage lies in its verified listings, user ratings, and extensive filtering options. The partnership ecosystem includes regional sites and integration with major advertising and analytics providers. Growth indicators include a broad property portfolio and consistent branding across markets.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, presence of key security headers, and no visible exposure of sensitive data. The use of third-party scripts and advertising networks introduces some risk, but no immediate vulnerabilities were detected in the content. The absence of explicit security policies and incident response contacts is a gap that could be addressed to improve transparency and readiness. GDPR compliance is evident through privacy and cookie policies with consent mechanisms. Overall, the security maturity is good but could benefit from enhanced header policies and published security documentation.

Recommendations

  1. Implement Content-Security-Policy and other advanced security headers to mitigate script injection risks.
  2. Publish a dedicated security policy and incident response contact information to improve transparency and trust.
  3. Regularly audit third-party scripts and advertising integrations for vulnerabilities and privacy compliance.
  4. Enhance contact information availability to support user trust and compliance requirements.
  5. Maintain and update privacy and cookie policies to reflect evolving regulations and best practices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Holidu GmbH
Description
Huge selection of high-quality holiday homes, holiday rentals, 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 home search and booking, Verified accommodation listings, Filters for amenities and preferences
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, React, ThumbmarkJS, Google Analytics, Google Tag Manager, Taboola, Bing Ads, Facebook Connect
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
  • Secure cookie consent mechanism

Analytics and tracking

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

Advertising

Ad networks
Taboola, Bing Ads, Facebook Ads
Tracking pixels
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 a professional vacation rental platform targeting European markets.
  2. Content is rich with multiple property listings and filtering options.
  3. Strong branding and consistent user interface.
  4. Good privacy and cookie policy presence with consent mechanisms.
  5. Use of multiple third-party analytics and advertising services.
  6. No contact emails or phone numbers explicitly found in the HTML content.
  7. No visible security or incident response policies on the site.
  8. WHOIS data is privacy protected with no registrar or dates available.
  9. No WAF or blocking detected; site fully accessible.
Technical notes

Notes

The website is built on a modern JavaScript framework (React) with asynchronous loading of fonts and scripts to optimize performance. It uses multiple third-party services for analytics, advertising, and 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 room for improvement in loading speed and resource optimization. No CMS is explicitly detected, suggesting a custom or proprietary platform. Hosting provider details are not disclosed. The technical stack supports a scalable and user-friendly vacation rental marketplace but requires ongoing maintenance to manage third-party dependencies and security.
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. 73/100Medium26 findingsView report
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