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Security report for sefe-energy.co.uk

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 market, offering a broad range of gas, electricity, and renewable energy products tailored to business customers. The company is part of the larger SEFE Group, which has a strong European presence and a focus on decarbonisation and sustainable energy solutions. Their website reflects a professional and modern digital presence with comprehensive content, clear navigation, and strong branding consistency. Technically, the site leverages modern web technologies including Umbraco CMS, Vue.js components, and integrates multiple analytics and marketing tools with user consent mechanisms. Security posture is solid with HTTPS enforced and cookie consent implemented, though explicit security policies and incident response information are not publicly disclosed. The domain WHOIS data is unavailable due to a registry error indicating the domain name is invalid, which is a concern for domain legitimacy but the website content and business information are credible and consistent with a legitimate energy supplier. Overall, the site scores well on content quality, technical implementation, and privacy compliance, with minor penalties for WHOIS inconsistencies and missing security policy disclosures.

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.co.uk

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.

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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
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 holds a strong market position as a leading business gas supplier in the UK, supported by a multi-national capability through its parent SEFE Group. The company targets medium to large business customers seeking reliable and sustainable energy solutions. Their business model focuses on providing fixed, flexible, and renewable energy products alongside decarbonisation services such as carbon credits and energy selling. The presence of a customer portal and award-winning customer service team enhances customer engagement and retention. The company demonstrates growth potential through its European subsidiaries and investment in clean energy technologies. Partnerships and certifications like Ecovadis Silver and Trustpilot reviews reinforce their credibility. The website's integration of marketing and analytics tools indicates a mature digital marketing strategy aimed at lead generation and customer support.

Security posture

The website demonstrates a mature security posture with HTTPS enforced site-wide and a comprehensive cookie consent mechanism aligned with GDPR requirements. The use of modern analytics platforms such as Matomo and Microsoft Clarity is managed with user consent, reducing privacy risks. However, the absence of explicit security policies, incident response procedures, and vulnerability disclosure statements represents a gap in transparency and readiness. No critical vulnerabilities or exposed sensitive data were detected in the site content. Security headers are implied but not explicitly confirmed, suggesting room for improvement in HTTP header security configurations. Overall, the security posture is good but could be enhanced by publishing formal security and incident response documentation and verifying security header implementations.

Recommendations

  1. Publish a clear security policy and incident response plan on the website to improve transparency and customer trust.
  2. Verify and implement comprehensive HTTP security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Address the domain WHOIS inconsistency by ensuring the domain registration details are accurate and publicly available to enhance legitimacy.
  4. Consider adding a vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  5. Maintain and regularly update cookie and privacy policies to comply with evolving data protection regulations and best practices.

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 providing gas, electricity, and low carbon energy options to over 30,000 customers across the UK and 50,000 across Europe. They help organisations solve energy challenges and offer tailored energy solutions including fixed, flexible, and renewable energy products.
Key services
Business gas supply, Business electricity supply, Renewable energy products, Decarbonisation solutions, Carbon credits and offsetting, 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, CookieControl
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 consent management

Analytics and tracking

Services
Matomo, Microsoft Clarity
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Google Analytics (via Matomo), Microsoft Clarity, Convert Experiences, Trustpilot widget
Marketing tools
CookieControl
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. Professional and consistent branding with clear business focus on energy supply.
  3. Comprehensive cookie and privacy policies with consent management implemented.
  4. Use of modern analytics and marketing technologies with user consent.
  5. No visible security policy or incident response information published.
  6. WHOIS data is missing or invalid for the domain, which is a concern for domain legitimacy.
  7. Strong social media presence and trust indicators like Ecovadis Silver and Trustpilot reviews.
  8. No adult or questionable content detected; content is safe for general audiences.
Technical notes

Notes

The website is built on the Umbraco CMS platform with Vue.js components, leveraging modern JavaScript frameworks and modular CSS for responsive design. It uses multiple third-party analytics and marketing tools including Matomo, Microsoft Clarity, Google Tag Manager, and Convert Experiences, all integrated with a robust cookie consent mechanism. The site demonstrates fast performance and excellent mobile optimization, with accessibility features such as skip links and ARIA labels. The use of SVG icons and modern CSS features indicates a contemporary front-end implementation. No major technical debt or deprecated technologies were detected. Hosting provider details are not explicitly identified from the content. Overall, the technical infrastructure supports a professional and scalable digital 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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