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Security report for holidu.com.br

Holidu GmbH · Hospitality · Brazil

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

Security score

75/100

Risk levelMedium

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

Holidu GmbH operates a professional online vacation rental platform specializing in seasonal homes, beach houses, chalets, and apartments, with a strong focus on family-friendly and pet-friendly accommodations. The website targets vacation renters primarily in Brazil, offering verified listings and competitive pricing. The platform is part of a larger international group with multiple country-specific sites, positioning itself as a specialist in the European and global vacation rental market. Technically, the site leverages modern JavaScript frameworks like React, fingerprinting technologies, and integrates with major analytics and advertising platforms such as Google Analytics, Facebook, and Taboola. Security posture is strong with HTTPS enforcement and standard security headers, though some improvements like CSP and security.txt are recommended. Privacy compliance is well addressed with comprehensive policies and cookie consent mechanisms. Overall, the site presents a trustworthy, professional, and user-friendly experience with high-quality content and design.

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.com.br

This scan found 18 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.

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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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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
70
Network security
100
GDPR outside view
58
Average
75

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's market positioning as a vacation rental aggregator with verified listings provides competitive advantages in trust and user confidence. The business model relies on online bookings and partnerships with property owners. The presence of multiple localized domains indicates a broad geographic reach and a mature partnership ecosystem. Revenue streams likely include commissions on bookings and advertising. The target customer segments include families, pet owners, and travelers seeking quality vacation homes. Growth indicators include extensive property listings and integration with major ad networks. Strategic observations suggest continued expansion in international markets and enhancement of user engagement through mobile apps and personalized services.

Security posture

The website demonstrates a mature security posture with HTTPS, no exposed sensitive data, and use of security headers. The presence of fingerprinting scripts indicates advanced user tracking, which is balanced by clear cookie consent mechanisms. However, the absence of a published security policy, incident response contacts, and vulnerability disclosure channels represents gaps in transparency and readiness. Compliance with GDPR is indicated but could be strengthened with explicit data retention disclosures and a dedicated DPO contact. No critical vulnerabilities or malware indicators were found. Overall, the security maturity is good but can be improved by publishing more security governance documentation and implementing CSP headers.

Recommendations

  1. Publish a dedicated security policy and incident response page to enhance transparency.
  2. Implement a security.txt file to facilitate vulnerability disclosures.
  3. Add a clearly accessible terms of service page to clarify user agreements.
  4. Enhance contact information availability, including support and security contacts.
  5. Introduce Content-Security-Policy headers to mitigate XSS and related attacks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Holidu GmbH
Description
Enorme seleção de casas de férias, apartamentos para temporada, fazendas com alojamento verificado ao melhor preço, reserva com confiança. Aluguéis de férias com piscina, vista para o mar, adequadas para crianças e animais de estimação. Especialista nos mais belos destinos de férias na Europa.
Key services
Vacation home rentals, Seasonal apartments, Beach houses, Chalets, Pet-friendly accommodations
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, React, ThumbmarkJS fingerprinting, Google Analytics, Google Tag Manager, Taboola, Bing Ads, Facebook Connect
Frameworks
React
Platforms
AWS (Amazon Web Services)
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

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

Analytics and tracking

Services
Google Analytics
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Taboola, Bing Ads, Facebook Ads
Tracking pixels
Facebook Pixel
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 localized for Brazil.
  2. Strong use of modern web technologies and analytics.
  3. Comprehensive cookie and privacy policies with consent mechanisms.
  4. No visible contact emails or phone numbers on the homepage.
  5. No explicit terms of service or security policy pages found.
  6. No security.txt or vulnerability disclosure information detected.
  7. High-quality images and user interface design.
  8. Multiple language and country versions linked via hreflang tags.
  9. Use of fingerprinting technology (ThumbmarkJS) for user tracking.
  10. No WAF or blocking mechanisms detected.
Technical notes

Notes

The website is built on a modern React-based frontend, hosted on AWS infrastructure with CDN support. It uses asynchronous loading of fonts and scripts to optimize performance. Integration with multiple analytics and advertising platforms is evident, including Google Analytics, Facebook Pixel, Taboola, and Bing Ads. The site is mobile-optimized with responsive design and accessibility considerations. DNS is managed via AWS name servers, indicating reliable hosting. Performance is fast with preconnect and preload hints. No CMS was explicitly detected, suggesting a custom or headless architecture. Technical risks are minimal but monitoring third-party scripts for vulnerabilities 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. 76/100Low25 findingsView report
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