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Security report for sefe-energy.com

SEFE Energy UK · Energy · United Kingdom

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

Security score

66/100

Risk levelMedium

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

SEFE Energy UK is a reputable business energy supplier operating primarily in the UK and Europe, offering a broad portfolio of gas, electricity, and renewable energy products tailored to business needs. The company positions itself as a leading supplier with over 50,000 customers and a strong focus on decarbonisation and sustainability solutions. The website reflects a mature digital presence with modern technologies such as Vue.js and Umbraco CMS, integrated analytics platforms including Matomo and Microsoft Clarity, and a comprehensive cookie consent mechanism ensuring GDPR compliance. Security posture is solid with HTTPS enforcement and cookie management, though some security headers could be improved. The WHOIS data is unavailable due to a domain naming rules error from Nominet UK, which is unusual but the website content and business information strongly support legitimacy. Overall, the site demonstrates professionalism, trustworthiness, and a strong market position in the energy sector.

Scanned

NIS2 and GDPR posture

GDPR outside view
80/ 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 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. 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. 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

  4. DNS health

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

    • High

      Unregistered MX Record

      MX record points to unregistered domain:

      What to do: Remove or fix MX record pointing to unregistered domain

      • RFC 5321 §5.1
      • 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 sefe-energy.com

This scan found 25 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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Full report

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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
77
Security headers
25
Email security
70
DNS health
45
Network security
100
GDPR outside view
80
Average
66

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

SEFE Energy UK operates within the energy sector, focusing on business customers requiring gas and electricity supply, including renewable and decarbonisation options. The company benefits from a multi-national presence with subsidiaries in the Netherlands, France, and Germany, and is part of the larger SEFE Group owned by the German Federal Government. Their business model emphasizes tailored energy solutions, customer service excellence, and sustainability. The presence of certifications like Ecovadis Silver and Trustpilot reviews enhances credibility. The company targets medium to large enterprises and multi-national organizations, leveraging a centralized customer portal and specialist account managers. The website's clear navigation, rich content, and integrated marketing and analytics tools indicate a well-developed digital strategy supporting customer acquisition and retention.

Security posture

The website employs HTTPS with good SSL configuration, uses cookie consent mechanisms aligned with GDPR, and integrates multiple analytics and marketing scripts responsibly. However, some recommended security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options are not explicitly detected and should be implemented to enhance protection against common web attacks. No exposed sensitive data or vulnerable libraries were found in the HTML content. The use of third-party scripts like Trustpilot, LiveChat, and Convert Experiences is managed with integrity attributes and asynchronous loading to minimize risk. Overall, the security posture is good but could be improved with additional HTTP headers and regular security audits.

Recommendations

  1. Implement and enforce Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options HTTP headers to strengthen security.
  2. Conduct regular third-party script audits to ensure no vulnerabilities or privacy issues arise from external dependencies.
  3. Enhance form security by verifying CSRF protections and input validations across all user input points.
  4. Maintain and update all CMS and JavaScript libraries to latest secure versions to mitigate known vulnerabilities.
  5. Provide a dedicated security or incident response contact channel to improve transparency and readiness.

Contact details published on the site

Addresses
Legal name
SEFE Energy UK
VAT number
GB927405129
Registration number
03904624
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SEFE Energy UK
Description
SEFE Energy UK is a leading non-domestic energy supplier helping organisations across Europe with tailored energy solutions including gas, electricity, and decarbonisation products.
Key services
Business gas supply, Business electricity supply, Renewable energy products, Decarbonisation solutions, Carbon credits, Customer portal and account management
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Matomo Analytics, Google Tag Manager, Microsoft Clarity, Convert Experiences, LiveChat, Umbraco CMS
Frameworks
Vue.js, Umbraco CMS
Platforms
Umbraco CMS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • Use of security and analytics scripts with integrity and crossorigin attributes

Analytics and tracking

Services
Matomo, Google Analytics (via GTM), Microsoft Clarity
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Matomo, Microsoft Clarity, Convert Experiences, Trustpilot
Marketing tools
Matomo, Microsoft Clarity, Convert Experiences, Trustpilot
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. WHOIS data is unavailable due to domain naming rules error from Nominet UK.
  3. Strong presence of privacy and cookie policies with consent mechanisms.
  4. Multiple social media and partner domains linked clearly.
  5. Use of modern web technologies and analytics tools.
  6. Good security posture with HTTPS and cookie consent but missing some security headers.
  7. Clear business information including company registration and VAT number.
  8. No adult or questionable content detected.
  9. Trustpilot reviews and Ecovadis Silver certification enhance trust.
Technical notes

Notes

The website is built on Umbraco CMS with Vue.js components, leveraging modern JavaScript modules and CSS features for responsive and accessible design. Performance is optimized with preconnect hints, async script loading, and image optimizations including WebP formats. Analytics and marketing integrations include Matomo, Google Tag Manager, Microsoft Clarity, and Trustpilot widgets, indicating a mature digital marketing infrastructure. The site is mobile-optimized with good accessibility features such as skip links and ARIA labels. No major technical debt or deprecated technologies were detected. The absence of explicit hosting provider information limits deeper infrastructure insights but the site appears stable and performant.
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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