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Security report for holidu.com.br

Holidu GmbH · Real Estate · Brazil

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

Security score

76/100

Risk levelLow

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

Holidu GmbH operates a professional online vacation rental platform specializing in holiday homes, apartments, and chalets primarily targeting Brazilian and European travelers. The website offers a wide selection of verified properties with features catering to families and pet owners, positioning itself as a trusted marketplace with competitive pricing and free cancellation options. Technically, the site leverages modern JavaScript frameworks like React, integrates multiple analytics and marketing tools, and is hosted on Amazon AWS infrastructure, ensuring good performance and mobile optimization. Security posture is strong with HTTPS enforcement and standard security headers, though explicit security policies and incident response information are not publicly available. Privacy compliance is well addressed with comprehensive privacy and cookie policies and consent mechanisms. Overall, the domain registration data aligns with the business claims, supporting legitimacy and trustworthiness.

Scanned

This is an earlier scan of holidu.com.br. 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.com.br

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

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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
77
Security headers
70
Email security
80
DNS health
70
Network security
100
GDPR outside view
58
Average
76

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 GmbH holds a significant market position as a specialist vacation rental platform with verified listings and a focus on family and pet-friendly accommodations. The business model revolves around an online marketplace facilitating bookings with a broad geographic reach. The company benefits from a consistent brand presence and trust indicators such as star host badges and free cancellation policies. The use of multiple marketing and tracking services indicates a mature digital marketing strategy aimed at customer acquisition and retention. However, direct contact information and detailed security disclosures are limited, which could be improved to enhance transparency and customer trust.

Security posture

The website demonstrates a mature security posture with HTTPS enforced, use of security headers, and secure form handling. No exposed sensitive data or vulnerable libraries were detected in the analyzed content. However, the absence of a published security policy, incident response plan, or vulnerability disclosure program limits the transparency of the security culture. The use of multiple third-party scripts requires ongoing vigilance to mitigate supply chain risks. Overall, the security maturity is good but could be enhanced by publishing explicit security and incident response information and establishing a vulnerability disclosure channel.

Recommendations

  1. Publish a dedicated security policy and incident response information on the website.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide clear contact channels for security incidents, such as security@ or abuse@ email addresses.
  4. Regularly audit and update third-party scripts and dependencies to mitigate supply chain risks.
  5. Enhance transparency by including more detailed business contact information and certifications.
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. Alojamento verificado ao melhor preço, reserve 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 rental search and booking, Verified property listings, Filters for family-friendly, pet-friendly, and amenities, Multi-language and multi-currency support
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, React, Google Analytics, Bing Ads, Taboola, AWS DNS
Frameworks
React
Platforms
Web
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 forms with POST methods

Analytics and tracking

Services
Google Analytics, Microsoft Clarity
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Bing Ads, Taboola
Tracking pixels
Microsoft Clarity, Bing Ads, Facebook Connect
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 Brazilian and European markets.
  2. Strong use of modern web technologies and analytics tools.
  3. Good privacy and cookie policy presence with consent mechanisms.
  4. No direct contact emails or phone numbers found on the homepage HTML.
  5. No explicit security or incident response policies published.
  6. Use of multiple third-party marketing and tracking services.
  7. No signs of adult or questionable content.
  8. WHOIS data consistent with business claims and hosting on AWS.
Technical notes

Notes

The website is built on a modern JavaScript stack, likely React, with asynchronous loading of analytics and marketing scripts to optimize performance. Hosting on AWS with multiple AWS DNS servers indicates a robust infrastructure. The site is well optimized for mobile devices and accessibility, with proper meta tags and SEO practices. The use of preconnect and preload hints improves resource loading efficiency. No CMS was explicitly detected, suggesting a custom or headless architecture. Overall, the technical implementation supports a fast, responsive, and user-friendly experience with room for further enhancements in security transparency.
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. 75/100Medium26 findingsView report
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