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Security report for vandebron.nl

Vandebron · Energy · Netherlands

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

72/100

Risk levelMedium

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

Vandebron is a Dutch energy supplier specializing in 100% sustainable green energy sourced directly from Dutch producers. The company has established a strong market presence in the Netherlands with over 200,000 customers, offering various energy contracts including fixed, variable, and dynamic pricing models. Their business model emphasizes transparency and sustainability, appealing to environmentally conscious consumers. Technically, the website uses modern web technologies such as React, Contentful CMS, and integrates marketing and analytics tools like Google Tag Manager and Visual Website Optimizer. The site is well-optimized for performance and mobile devices, providing an excellent user experience. Security-wise, the website enforces HTTPS, uses DNSSEC, and implements cookie consent mechanisms, but lacks explicit privacy and security policies publicly available. Overall, Vandebron demonstrates a mature digital presence with minor compliance gaps.

Scanned

NIS2 and GDPR posture

GDPR outside view
73/ 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

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"

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • 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. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

  4. 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 vandebron.nl

This scan found 19 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
80
Security headers
30
Email security
75
DNS health
75
Network security
100
GDPR outside view
73
Average
72

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

Vandebron operates in the competitive Dutch energy market with a focus on renewable energy. Their direct sourcing from producers and transparent pricing provide a competitive advantage. The company actively markets through discount campaigns and uses advanced analytics and optimization tools to enhance customer acquisition and retention. The target audience is Dutch consumers seeking sustainable energy solutions. The company is medium-sized, founded in 2014, and maintains consistent branding and professional content. No parent or subsidiary companies were identified from the data. The business model relies on energy supply contracts with various pricing options and discounts to attract customers.

Security posture

The website exhibits a good security posture with HTTPS enforced and DNSSEC enabled, reducing risks of DNS spoofing. Cookie consent is implemented, indicating awareness of privacy regulations. However, the absence of a published privacy policy, terms of service, security policy, and incident response contact reduces transparency and compliance completeness. No vulnerabilities or exposed sensitive data were detected in the analyzed content. The use of reputable third-party services for analytics and marketing is noted, but continuous monitoring for library vulnerabilities is recommended. Implementing security.txt and enhancing HTTP security headers would further strengthen security.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service to improve compliance and user trust.
  2. Add a security policy and incident response contact information to enhance transparency and readiness.
  3. Implement a security.txt file to facilitate responsible vulnerability disclosure.
  4. Review and enhance HTTP security headers such as Content-Security-Policy and X-Frame-Options.
  5. Maintain regular security audits and update third-party libraries to mitigate vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Vandebron
Description
Vandebron is a Dutch energy supplier focused on providing 100% sustainable green energy sourced from Dutch producers. The company emphasizes transparency and direct connection between energy producers and consumers.
Key services
Green electricity supply, Gas supply, Energy contracts with fixed, variable, and dynamic pricing, Discount campaigns for new customers
Content quality
excellent
Branding
consistent

Technology

Stack
React (implied by webpack and chunked JS/CSS), Google Tag Manager, Visual Website Optimizer (VWO), CookieYes (cookie consent), Unbounce (landing page tool)
Frameworks
React
Platforms
Contentful CMS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • DNSSEC enabled
  • Cookie consent banner present
  • No exposed sensitive data detected in HTML

Analytics and tracking

Services
Google Tag Manager, Visual Website Optimizer
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Visual Website Optimizer
Marketing tools
Unbounce, VWO, CookieYes
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and well-structured.
  2. Strong focus on sustainable energy and customer engagement.
  3. Multiple discount campaigns indicate active marketing and customer acquisition.
  4. Cookie consent and tracking scripts are implemented responsibly.
  5. Lack of explicit privacy policy and terms of service pages is a minor compliance gap.
  6. No direct contact information (email, phone, address) found in the provided HTML snippet.
  7. No security.txt or vulnerability disclosure policy found.
Technical notes

Notes

The website is built using modern web technologies including React and Contentful CMS, ensuring a scalable and maintainable infrastructure. Performance optimizations such as chunked CSS and JS, preloading, and mobile-optimized images are implemented, resulting in fast load times and excellent mobile experience. Integration with marketing and analytics tools like Google Tag Manager and VWO supports data-driven decision making. Hosting details are limited but domain registration and DNSSEC indicate a secure foundation. Opportunities exist to improve technical SEO and accessibility further by adding ARIA attributes and structured data markup for enhanced search engine understanding.
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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