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Security report for nvm.nl

Nederlandse Coöperatieve Vereniging van Makelaars en Taxateurs in onroerende goederen NVM U.A. · Real Estate · Netherlands

Medium risk. 5 critical or high findings in Security headers, SSL/TLS and 1 other check.

Security score

68/100

Risk levelMedium

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

The Nederlandse Coöperatieve Vereniging van Makelaars en Taxateurs in onroerende goederen NVM U.A. (NVM) is a well-established cooperative association representing over 5500 real estate professionals in the Netherlands. Founded in 1898 and headquartered in Utrecht, it holds a leading position in the Dutch real estate sector, providing membership services, industry representation, and market data. The website reflects this professional stature with clear branding and relevant content targeting both industry members and consumers. Technically, the website employs modern digital tools including Google Tag Manager, Google Analytics, Cookiebot for cookie consent management, and LinkedIn Insight tags. The site is served over HTTPS with appropriate security headers, indicating a strong security posture. Performance and mobile optimization are good, though accessibility could be improved. The cookie consent mechanism is comprehensive and GDPR compliant, reflecting a mature privacy approach. Security-wise, the site demonstrates good practices such as HTTPS enforcement and security headers but lacks publicly available security policies or incident response contacts. No vulnerabilities or suspicious patterns were detected. The WHOIS data aligns well with the business identity, confirming legitimacy and trustworthiness. Overall, the website is professional, secure, and compliant with privacy regulations, serving its audience effectively. Strategic improvements could focus on publishing explicit security policies and enhancing accessibility to further strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 100 · Low
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

5 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 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';…

  2. 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

  3. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Potential Subdomain Takeover

      Subdomain api.nvm.nl points to unregistered service api-972745963.eu-west-1.elb.amazonaws.com

      What to do: Remove or fix CNAME record to prevent subdomain takeover

      • WSTG-CONF-10
      • NIS2 21(2)(i)
      • IR 2024/2690 12.4: Implementing Regulation (EU) 2024/2690, Annex point 12.4: Asset inventory
      • NIST CM-8: NIST SP 800-53 Rev. 5 CM-8: System Component Inventory

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

Keep watching nvm.nl

This scan found 23 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

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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
80
DNS health
50
Network security
100
GDPR outside view
88
Average
68

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

NVM operates as a large cooperative in the real estate sector, serving a broad membership base of real estate agents and appraisers. Its market position as the largest association in the Netherlands provides competitive advantages including brand recognition and extensive industry influence. The business model centers on membership services, advocacy, and market intelligence. Revenue streams likely include membership fees and service offerings. The target customers are real estate professionals and property consumers in the Netherlands. The partnership ecosystem includes major advertising and analytics providers, supporting marketing and data-driven insights. The company’s long history and royal designation underscore its stability and reputation in the market.

Security posture

The website exhibits a mature security posture with HTTPS enforced and multiple security headers implemented, reducing common web vulnerabilities. The use of Cookiebot ensures compliance with cookie consent regulations. No exposed sensitive data or vulnerable libraries were detected. However, the absence of a public security policy or incident response contact limits transparency and readiness perception. There is no evidence of a vulnerability disclosure program or security.txt file. Overall, the security maturity is good but could be enhanced by formalizing security governance and incident response communication.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  4. Improve website accessibility to meet higher standards and broaden user inclusivity.
  5. Regularly review and audit third-party scripts and cookies to minimize privacy and security risks.

Contact details published on the site

Addresses
Legal name
Nederlandse Coöperatieve Vereniging van Makelaars en Taxateurs in onroerende goederen NVM U.A.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Nederlandse Coöperatieve Vereniging van Makelaars en Taxateurs in onroerende goederen NVM U.A.
Description
De Koninklijke Nederlandse Coöperatieve Vereniging van Makelaars en Taxateurs in onroerende goederen NVM U.A. (NVM) is met ruim 5500 aangesloten vastgoeddeskundigen de grootste brancheorganisatie van makelaars, taxateurs en vastgoeddeskundigen. NVM is gevestigd in Utrecht en bestaat sinds 1898.
Key services
Membership services for real estate agents and appraisers, Industry representation, Property market information and statistics
Content quality
good
Branding
consistent

Technology

Stack
Google Tag Manager, Google Analytics, Cookiebot, LinkedIn Insight Tag, Google Maps API
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data detected
  • Use of security headers

Analytics and tracking

Services
Google Analytics, LinkedIn Insight, Spotify analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Meta Platforms, Inc., Adform
Tracking pixels
LinkedIn Insight Tag, Facebook Pixel
Marketing tools
Google Optimize, Cookiebot
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Comprehensive cookie consent mechanism implemented with detailed cookie categories.
  3. No explicit contact emails or phone numbers found in the provided HTML snippet; contact likely via contact form.
  4. Use of multiple third-party analytics and marketing tools with proper consent.
  5. Good security posture with HTTPS and security headers.
  6. No evidence of security policy or incident response information publicly available.
  7. Business is a large, established cooperative in the Dutch real estate sector.
  8. Content is professional, relevant, and safe for general audiences.
Technical notes

Notes

The website uses a modern technology stack with Google Tag Manager, Analytics, Cookiebot, and LinkedIn Insight tags integrated for marketing and analytics. The presence of Google Maps API indicates location-based services. The site is served over HTTPS with strong security headers, indicating good infrastructure security. Performance is moderate with room for optimization. The site is mobile optimized and SEO friendly with proper meta tags and structured data (JSON-LD). No CMS or hosting provider details were explicitly detected. The technical implementation supports a professional and compliant online presence but could benefit from enhanced accessibility and performance tuning.
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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