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Security report for vivantus.nl

Vivantus Groep · Real Estate · Netherlands

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

61/100

Risk levelMedium

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

Vivantus Groep is the largest NVM real estate brokerage group in the Netherlands, established in 1967, offering a comprehensive suite of services including real estate brokerage, mortgage advice, insurance, and new construction projects. The company operates through multiple local brands and has a strong national presence with many offices. The website reflects a professional and consistent brand image, targeting home buyers and sellers in the Dutch market. Technically, the site uses modern web technologies including Umbraco CMS, Google Tag Manager, and Leaflet.js for maps, with good mobile optimization and SEO practices. Security posture is solid with HTTPS and DNSSEC enabled, though explicit security headers and policies are absent. Privacy compliance is partial, with a cookie consent banner but no visible privacy policy or terms of service pages. Overall, the site is trustworthy and well-maintained but could improve transparency on privacy and security policies.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 100 · Critical
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

9 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 Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

  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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • 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 vivantus.nl

This scan found 24 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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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
15
Email security
85
DNS health
85
Network security
100
GDPR outside view
10
Average
61

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

Vivantus holds a leading market position in Dutch real estate brokerage, leveraging a multi-brand strategy to cover local markets comprehensively. Their integrated business model combines property transactions with mortgage and insurance advisory, enhancing customer convenience and retention. The group’s size and number of employees indicate a large enterprise with significant operational scale. Partnerships and subsidiaries are clearly linked, supporting a broad service offering. The website content and structure support clear communication of services and brand identity, aiding customer engagement and lead generation.

Security posture

The website demonstrates a good security baseline with HTTPS enforced and DNSSEC enabled, reducing risks of interception and DNS spoofing. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of explicit security headers such as Content-Security-Policy and lack of published security or incident response policies represent gaps in security maturity. No vulnerability disclosure or security.txt files were found, limiting transparency for security researchers. Privacy compliance is partial, with cookie consent but no detailed privacy policy. Overall, the security posture is adequate but could be enhanced by adopting additional best practices and transparency measures.

Recommendations

  1. Publish a comprehensive privacy policy page detailing GDPR compliance and data handling practices.
  2. Add explicit security headers like Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options to strengthen browser security.
  3. Implement and publish a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  4. Provide an incident response contact channel (e.g., security@ or abuse@ email) to improve security communication.
  5. Enhance accessibility features to meet recognized standards and improve user experience for all visitors.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Vivantus Groep
Description
Vivantus is the largest NVM real estate brokerage group in the Netherlands with over 35 offices and multiple local brands. They offer comprehensive services including real estate brokerage, mortgage advice, insurance, and new construction projects, all under one roof.
Key services
Real estate brokerage, Mortgage advice, Insurance services, New construction projects
Content quality
good
Branding
consistent

Technology

Stack
Google Tag Manager, FontAwesome, Leaflet.js, Swiper.js, Umbraco Forms, Polyfill
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • DNSSEC enabled
  • No exposed sensitive data in HTML
  • No visible vulnerable libraries

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Transparency
basic

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
high

Key observations

  1. Website is professionally designed and well-structured.
  2. Clear business focus on real estate brokerage and related services.
  3. Multiple local brands and subsidiaries are linked and referenced.
  4. Contact information is clearly provided with phone, email, and physical address.
  5. Cookie consent mechanism is implemented.
  6. No explicit privacy policy or terms of service pages found.
  7. No visible security or incident response policies published.
  8. Uses modern web technologies and CMS (Umbraco).
  9. No WAF or blocking detected; content fully accessible.
  10. No adult or questionable content detected.
Technical notes

Notes

The website is built on the Umbraco CMS platform, utilizing modern JavaScript libraries such as Leaflet.js for interactive maps and Swiper.js for sliders. Google Tag Manager is used for analytics and marketing tags, indicating a mature digital marketing setup. The site is mobile-optimized with responsive images and navigation. Performance appears moderate with deferred scripts and optimized assets. No major technical debt or deprecated technologies were observed. Opportunities exist to improve accessibility and implement additional security headers. Hosting provider details are not explicitly identified from the content.
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

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