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Security report for eon.cz

E.ON · Energy · Czech Republic

Low risk. 3 critical or high findings in GDPR outside view.

Security score

83/100

Risk levelLow

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

E.ON Czech Republic operates as a major energy supplier providing electricity and gas services primarily to households, businesses, and municipalities. The company emphasizes competitive pricing, renewable energy solutions, and digital customer engagement through its Energie24 app and online contract management. The website reflects a mature digital presence with comprehensive service offerings and customer support. Technically, the site leverages modern web technologies including Kentico CMS, jQuery, and integrates analytics and consent management tools, ensuring good performance, SEO, and privacy compliance. Security posture is strong with HTTPS enforcement and consent mechanisms, though explicit security policies and incident response contacts are not publicly detailed. The absence of WHOIS data is a notable transparency gap but does not detract from the overall legitimacy indicated by the website content and branding.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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. GDPR outside view

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

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, LinkedIn, YouTube, Cloudflare

      What to do: Document all third-party data sharing in your privacy policy

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

Keep watching eon.cz

This scan found 12 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
100
Security headers
90
Email security
85
DNS health
85
Network security
100
GDPR outside view
40
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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention eon.cz, from OffSeq Breach.

Total records
7,375
Employees
0
Customers
7,366
Third parties
9
Weak passwords
9%

47 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for eon.cz.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

E.ON holds a leading market position in the Czech energy sector, serving approximately 1.5 million customers. Its business model focuses on energy supply combined with value-added services such as energy-efficient technologies (photovoltaics, heat pumps), customer loyalty programs, and digital tools for customer convenience. The company targets a broad audience including residential customers, small businesses, and energy producers. Partnerships with service providers like SmartForm and integration of Usercentrics for consent management indicate a strategic approach to customer data handling and digital marketing. The website content and navigation are designed to facilitate customer acquisition and retention through clear calls to action and online service capabilities.

Security posture

The website demonstrates a solid security foundation with HTTPS and use of a consent management platform, reducing risks related to data privacy and compliance. However, the lack of explicit security policies, incident response contacts, and vulnerability disclosure mechanisms suggests room for improvement in transparency and readiness. No obvious vulnerabilities or exposed sensitive data were detected in the content. Security headers are partially inferred but not explicitly confirmed. Overall, the security posture is good but could be enhanced by publishing formal security documentation and establishing clear incident response channels.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and compliance.
  2. Provide clear incident response contact information including security@ or abuse@ email addresses.
  3. Implement and publicize a vulnerability disclosure program or security.txt file.
  4. Verify and explicitly set all recommended HTTP security headers (CSP, X-Frame-Options, etc.).
  5. Improve WHOIS transparency or provide domain registration details on the website to enhance trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
E.ON
Description
Získejte výhodné ceny energií od E.ONu. Už víc než 20 jsme spolehlivým dodavatelm elektřiny i plynu pro domácnosti, firmy i obce a města.
Key services
Electricity supply, Gas supply, Energy tariffs, Customer care, Energy technology services (photovoltaics, heat pumps, gas boilers), Mobile app Energie24, Online contract management
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery, SmartForm, Usercentrics CMP, Google Tag Manager, Google Analytics, Kentico CMS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of consent management platform (Usercentrics)
  • No exposed sensitive data in HTML
  • Secure forms with client-side validation

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Facebook Pixel
Marketing tools
Usercentrics CMP
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. Content is comprehensive and targeted at Czech energy consumers
  3. Strong use of structured data and SEO best practices
  4. No signs of malicious or suspicious content
  5. WHOIS data is missing, which is a concern for domain transparency
  6. Good privacy and cookie consent mechanisms implemented
  7. Multiple customer service and contact options available
  8. Use of modern web technologies and analytics tools
Technical notes

Notes

The website is built on Kentico CMS and uses modern JavaScript libraries such as jQuery and integrates third-party services including SmartForm for forms and Usercentrics for consent management. Hosting appears to be on Microsoft Azure CDN infrastructure, supporting fast content delivery. The site is mobile-optimized with responsive design and accessibility considerations. SEO is well addressed with proper meta tags, Open Graph, and JSON-LD structured data. Performance is likely fast given CDN usage and optimized assets. Technical risks are minimal but maintaining updated libraries and security headers is recommended to mitigate potential vulnerabilities.
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

Earlier scans of this domain

  1. 83/100 +35Low21 findingsView report
  2. 48/100High21 findingsView report
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