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Security report for nuon.com

Vattenfall · Energy · Netherlands

Low risk. 3 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

83/100

Risk levelLow

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

Vattenfall is a major European energy company with a dedicated newsroom website providing news and press releases primarily for the Dutch market. The website demonstrates a professional digital presence with good design quality, mobile optimization, and compliance with GDPR and cookie consent regulations. The technical infrastructure includes modern JavaScript and CSS assets, integration with consent management platforms, and analytics tools such as Google Analytics and Piwik Pro. Security posture is solid with HTTPS enforced and consent mechanisms in place, though there is room for improvement in security headers and explicit security policies. The absence of WHOIS data suggests privacy protection, which is justified for a large enterprise. Overall, the website is trustworthy and well-maintained, serving its corporate communication purpose effectively.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 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

3 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 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.

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

Keep watching nuon.com

This scan found 13 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.

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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
100
Security headers
50
Email security
77
DNS health
85
Network security
100
GDPR outside view
85
Average
83

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

Vattenfall operates in the energy sector, targeting general public, media, and stakeholders with news and sustainability updates. The company is positioned as a large enterprise with a focus on energy production and supply. The business model revolves around energy services with a strong emphasis on sustainability. The website supports brand consistency and trust through official logos and structured data. The presence of multiple third-party marketing and analytics tools indicates a mature digital marketing strategy. However, direct contact information is not prominently available on the newsroom page, possibly centralized elsewhere on the corporate site.

Security posture

The website uses HTTPS and a consent management platform, indicating awareness of privacy and security best practices. However, no explicit security headers were detected in the provided data, and no security.txt or incident response contacts were found. The use of multiple third-party scripts introduces potential risk vectors that require ongoing monitoring. No vulnerabilities or exposed sensitive data were identified. The security score is good but could be enhanced by adding security policies, headers, and vulnerability disclosure mechanisms.

Recommendations

  1. Implement and enforce security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Publish a clear security policy and incident response contact information to improve transparency and readiness.
  3. Add a vulnerability disclosure or security.txt file to facilitate responsible reporting of security issues.
  4. Enhance accessibility features to improve compliance and user experience for all visitors.
  5. Regularly audit and update third-party scripts to mitigate risks from external dependencies.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Vattenfall
Description
Vattenfall is an energy company providing news and press releases related to its operations in the Netherlands.
Key services
Energy production, Energy supply, Sustainability initiatives
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, CSS, HTML5, Consent Manager, Google Analytics, Google Tag Manager
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Consent management platform used

Analytics and tracking

Services
Google Analytics, Piwik Pro
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
DoubleClick, Facebook
Tracking pixels
Piwik Pro
Marketing tools
Consent Manager
Transparency
basic

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 challenge
  2. No WHOIS data available publicly, likely privacy protected
  3. Strong use of consent management and GDPR compliance
  4. No visible contact emails or phone numbers on the analyzed page
  5. No security.txt or explicit security policy found
  6. Use of multiple third-party analytics and advertising scripts
  7. Good mobile optimization and responsive design
  8. No adult or questionable content detected
Technical notes

Notes

The website employs a modern front-end stack with CSS bundles and JavaScript for interactivity and analytics. It uses a consent management platform to comply with GDPR and cookie regulations. The site is mobile-optimized and uses responsive design techniques. Performance appears moderate with preloading of fonts and assets. No CMS or hosting provider information was explicitly detected. The site could benefit from improved accessibility and SEO enhancements. The technical implementation supports a professional corporate communication platform with room for further modernization and security hardening.
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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