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Security report for holidaycheck.de

HolidayCheck AG · 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 AG operates a leading German-language hotel review and travel booking portal, offering comprehensive hotel comparisons, price comparisons from over 100 travel providers, and a best price guarantee. The platform targets primarily German-speaking travelers seeking family-friendly vacation options, last-minute deals, and car rentals. The website demonstrates a strong market position in the hospitality sector within Germany and neighboring countries. Technically, the site employs modern web technologies including React, JavaScript, and integrates performance and privacy tools such as Google Tag Manager and New Relic. Hosting is likely provided by Noris Network, consistent with the domain's nameservers. Security posture is robust with HTTPS enforcement, security headers, and GDPR-compliant consent mechanisms, although explicit security policy and incident response information are not publicly available. Overall, the website is professional, trustworthy, and well-optimized for performance and accessibility.

Scanned

This is an earlier scan of holidaycheck.de. View the latest report

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.de

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

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  • 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 AG holds a strong market position as a trusted travel portal in the German-speaking market, leveraging a large user base with over 11 million hotel reviews. The business model combines user-generated content with travel booking services, generating revenue through commissions and advertising. The company maintains partnerships with related travel service providers and subsidiaries, expanding its offerings to include vacation rentals and specialized travel segments like ski holidays and train travel. The platform's comprehensive navigation and content strategy support user engagement and conversion. Growth indicators include a well-maintained app presence and continuous marketing campaigns. Strategic partnerships and a consistent brand presence reinforce its competitive advantage.

Security posture

The website exhibits a mature security posture with enforced HTTPS, comprehensive security headers (CSP, HSTS, X-Frame-Options), and integration of privacy management tools to ensure GDPR compliance. No critical vulnerabilities or exposed sensitive data were detected in the analyzed content. However, the absence of a publicly available security policy or incident response contact limits transparency in security governance. There is no evidence of a vulnerability disclosure program or security.txt file, which could enhance trust and facilitate responsible vulnerability reporting. Overall, the security measures align well with industry best practices for a large e-commerce and review platform.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and controls.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publicize a vulnerability disclosure program or security.txt file.
  4. Enhance transparency around data protection officer contact information.
  5. Continue to monitor and update third-party libraries to mitigate potential vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
HolidayCheck AG
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, Travel bookings, Price comparison, Last-minute deals, Car rentals
Content quality
excellent
Branding
consistent

Technology

Stack
React, JavaScript, CSS, HTML5, Google Tag Manager, New Relic, 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
  • Content Security Policy
  • Use of security headers
  • Consent management for GDPR

Analytics and tracking

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

Advertising

Ad networks
Google Tag Manager
Tracking pixels
New Relic, Privacy Management SDK
Marketing tools
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 professionally presented in German, targeting German-speaking travelers.
  3. Strong focus on family-friendly travel offers and hotel reviews.
  4. Comprehensive navigation with multiple travel categories and services.
  5. Use of modern web technologies and performance optimizations.
  6. Privacy and cookie policies are present with consent mechanisms.
  7. No explicit security policy or incident response information found.
  8. No vulnerability disclosure or security.txt detected.
  9. Contact phone number clearly displayed with context.
  10. No suspicious or malicious content detected.
Technical notes

Notes

The website is built on a modern React-based frontend with extensive use of JavaScript and CSS for responsive and accessible design. Performance optimizations include preloading images and scripts, use of CDN-hosted assets, and local storage management for user sessions. The tech stack integrates analytics and monitoring tools like New Relic and Google Tag Manager, supporting operational insights and marketing effectiveness. Hosting via Noris Network suggests a reliable infrastructure. The site demonstrates good SEO practices with meta tags, canonical links, and hreflang attributes for regional targeting. Technical debt appears minimal, with opportunities for further enhancement in security transparency and incident management.
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. 66/100Medium30 findingsView report
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