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Security report for holidaycheck.com

HolidayCheck · Hospitality · Germany

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

66/100

Risk levelMedium

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

HolidayCheck is a prominent German travel portal specializing in hotel reviews, travel bookings, and price comparisons. It serves a large audience in German-speaking countries with over 11 million hotel reviews and offers a comprehensive platform for package holidays, car rentals, and travel inspiration. The website demonstrates a mature digital presence with a modern React-based tech stack, optimized performance, and strong mobile responsiveness. Privacy and cookie consent mechanisms are implemented in compliance with GDPR. Security posture is solid with HTTPS, security headers, and no visible vulnerabilities, though explicit security policies and incident response details are not publicly disclosed. Overall, HolidayCheck presents a trustworthy and professional online travel service with a strong market position.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 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

7 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 X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • 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';…

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

Keep watching holidaycheck.com

This scan found 21 issues across 5 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
62
Security headers
25
Email security
100
DNS health
70
Network security
100
GDPR outside view
40
Average
66

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

HolidayCheck operates as a large-scale online travel agency and review platform targeting German-speaking travelers. Its business model leverages user-generated content, affiliate partnerships, and direct bookings. The company maintains a consistent brand and offers diversified services including hotel reviews, package deals, car rentals, and travel guides. Partnerships with other travel providers and marketing sites enhance its ecosystem. The platform's extensive content and user engagement indicate a strong competitive advantage in the hospitality sector. Growth opportunities include expanding transparency in security and compliance communications.

Security posture

The website employs HTTPS with strong SSL configuration and implements key security headers such as HSTS, CSP, and X-Frame-Options, indicating a mature security posture. Use of consent management platforms and privacy SDKs supports GDPR compliance. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of a public security policy, incident response plan, or vulnerability disclosure program suggests room for improvement in transparency and readiness. Overall, the security posture is robust but could benefit from enhanced communication and formalized security governance disclosures.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide clear contact information for security incidents or data protection officer.
  4. Regularly review and audit third-party scripts and tracking technologies for security risks.
  5. Enhance user account security by promoting multi-factor authentication and secure password policies.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
HolidayCheck
Description
HolidayCheck is a leading hotel review and travel portal offering hotel comparisons, price comparisons from 100 travel providers, and a best price guarantee with over 11 million hotel reviews.
Key services
Hotel reviews, Hotel bookings, Package travel deals, Car rental price comparison, Travel inspiration and guides
Content quality
excellent
Branding
consistent

Technology

Stack
React, JavaScript, CSS, HTML5, Polyfill.io, Google Tag Manager, New Relic, Optimizely, Privacy Management SDK
Frameworks
React
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • No exposed sensitive data in HTML
  • Use of consent management platform
  • Cookie consent mechanism

Analytics and tracking

Services
New Relic, Google Tag Manager, Optimizely
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Tag Manager
Tracking pixels
New Relic, Optimizely, Privacy Management SDK
Marketing tools
Userflow, Optimizely, New Relic
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. Content is rich, professionally designed, and well-structured.
  3. Strong focus on German-speaking travel market with extensive hotel reviews.
  4. Use of modern web technologies and performance optimizations.
  5. Good privacy and cookie consent mechanisms in place.
  6. No explicit security policy or incident response info publicly available.
  7. No vulnerability disclosure or security.txt found.
  8. WHOIS data is consistent and transparent.
  9. No suspicious or malicious external domains detected.
Technical notes

Notes

HolidayCheck's technical infrastructure is modern and well-optimized, utilizing React for frontend rendering and polyfills for broad browser compatibility. The site is hosted likely by Noris Network AG, a reputable German hosting provider, ensuring reliable performance and data locality. Integration with analytics and marketing tools such as New Relic, Optimizely, and Google Tag Manager supports operational monitoring and user experience optimization. The website is mobile-optimized with responsive design and accessibility features. SEO best practices are followed with proper meta tags and structured navigation. Technical risks are minimal, but continuous monitoring of third-party dependencies is advised.
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. 58/100Medium26 findingsView report
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