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Security report for nvn.nl

Nierstichting · Non-profit · Netherlands

Medium risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

70/100

Risk levelMedium

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

Nierstichting is a Dutch non-profit organization dedicated to promoting kidney health and supporting individuals affected by kidney disease. The website serves as a platform for patient support, awareness campaigns, and fundraising efforts. It holds recognized certifications such as ANBI and CBF, enhancing its credibility in the non-profit sector. The target audience includes patients, donors, and the general public interested in kidney health. The organization maintains a consistent brand presence and provides comprehensive information about its mission and services. Technically, the website is built using modern web technologies including React and Next.js, with integration of Google Tag Manager and Cookiebot for analytics and cookie consent management. The site demonstrates good performance, mobile optimization, and accessibility features, contributing to a positive user experience. SEO practices are adequately implemented through proper meta tags and structured data. From a security perspective, the site enforces HTTPS with strong SSL configuration and includes essential security headers. Cookie consent mechanisms comply with GDPR requirements, and no critical vulnerabilities or exposed sensitive data were detected. However, explicit security policies and incident response contacts are not publicly available, representing an area for improvement. Overall, the website presents a trustworthy and professional digital presence for Nierstichting, with strong privacy compliance and user-focused design. Strategic recommendations include publishing detailed security policies, providing incident response contacts, and adding vulnerability disclosure mechanisms to further enhance security posture and stakeholder trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 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

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 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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching nvn.nl

This scan found 22 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
75
Security headers
15
Email security
85
DNS health
60
Network security
100
GDPR outside view
83
Average
70

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

Nierstichting occupies a leading position in the Dutch kidney health non-profit sector, leveraging partnerships and campaigns to engage donors and patients. Its business model focuses on awareness, support services, and research funding. The organization benefits from certifications that reinforce donor confidence and regulatory compliance. The website reflects a mature digital strategy with integrated marketing and analytics tools, supporting data-driven decision making. Growth opportunities may lie in expanding digital engagement and transparency around security and compliance practices. The partnership ecosystem includes related domains focused on kidney disease projects, indicating collaborative efforts to broaden impact.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, comprehensive security headers, and GDPR-compliant cookie consent. No critical vulnerabilities or sensitive data exposures were identified in the content. However, the absence of a public security policy, incident response contact information, and vulnerability disclosure mechanisms suggests gaps in transparency and incident readiness. These gaps could impact stakeholder confidence in the event of a security incident. The use of third-party analytics and marketing tools is managed with user consent, aligning with privacy best practices. Overall, the security maturity is good but can be enhanced by formalizing and publishing security governance documents.

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 and publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  4. Enhance contact information with direct phone numbers or emails for security and privacy inquiries.
  5. Regularly review and update third-party integrations to ensure no vulnerable libraries or outdated components.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Nierstichting
Description
Gezonde nieren voor iedereen en een beter leven met nierziekte.
Key services
Patient support, Awareness campaigns, Research funding, Donor engagement
Content quality
good
Branding
consistent

Technology

Stack
React, Next.js, Google Tag Manager, Cookiebot
Frameworks
Next.js
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with opt-in/out
  • No exposed sensitive data in HTML
  • Secure cookies for session tokens

Analytics and tracking

Services
Google Analytics
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google DoubleClick, Reddit
Tracking pixels
Google Ads Conversion Tracking, Reddit Pixel
Marketing tools
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 via Cookiebot.
  3. No explicit terms of service page found on the analyzed page.
  4. Privacy policy is present, detailed, and GDPR compliant.
  5. No direct security policy or incident response contact found.
  6. Multiple trust certifications displayed (ANBI, CBF).
  7. Use of modern web technologies and frameworks.
  8. Extensive use of third-party analytics and marketing tools with proper consent.
  9. No suspicious or malicious domains detected.
  10. Content is focused on kidney health and patient support, suitable for general audiences.
Technical notes

Notes

The website is built on a modern React and Next.js framework, ensuring server-side rendering and good SEO capabilities. Integration with Google Tag Manager and Cookiebot indicates a mature approach to analytics and privacy compliance. The site uses preloading for images and scripts to optimize performance. Accessibility considerations are evident through ARIA roles and keyboard navigation support. The CSS and JavaScript are modular and asynchronously loaded, contributing to moderate to good performance. No CMS was explicitly detected, suggesting a custom or headless CMS solution. Hosting provider details are not disclosed in the content. Overall, the technical infrastructure supports a professional and scalable web presence.
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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