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Security report for c-energy.cz

C-energy s.r.o. · Energy · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

55/100

Risk levelMedium

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

C-energy s.r.o. is a Czech energy company specializing in sustainable and modern energy production, including electricity and heat supply with advanced technologies such as battery storage and cogeneration. The company serves the Tábor region and supports the national transmission system operator, positioning itself as a key regional energy provider within the C-Energy Group holding. The website reflects a professional and modern digital presence with clear business information and user-friendly navigation. Technically, the site uses standard web technologies and includes a cookie consent mechanism, but lacks some advanced security headers and explicit incident response information. The absence of WHOIS data is a notable concern for domain legitimacy, though the website content and contact details appear credible. Overall, the site demonstrates a good security posture with room for improvement in transparency and technical security controls.

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

8 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

  2. 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"

    • 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';…

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  • TLS certificates and expiry
  • DNS records
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  • 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
62
Security headers
20
Email security
100
DNS health
85
Network security
20
GDPR outside view
40
Average
55

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

The company operates in the energy sector with a focus on ecological and efficient energy sources, investing heavily in modernization and sustainability. Its business model revolves around energy production and supply, targeting local residents, businesses, and energy investors. The company benefits from its membership in the C-Energy Group, which enhances its market position and investment capacity. The website content and ESG reporting indicate a commitment to corporate responsibility and environmental standards. The company maintains active communication channels and social media presence, supporting customer engagement and transparency.

Security posture

The website enforces HTTPS and implements cookie consent, indicating awareness of privacy and security best practices. However, the lack of visible security headers such as Content-Security-Policy and absence of dedicated security or incident response pages suggest areas for improvement. No vulnerabilities or exposed sensitive data were detected in the HTML content. The site uses secure forms with anti-spam measures. The missing WHOIS data reduces overall trust in domain registration legitimacy, which is a security consideration. Enhancing security transparency and publishing a security.txt file would improve the security posture and incident response readiness.

Recommendations

  1. Implement standard security headers (CSP, X-Frame-Options, X-Content-Type-Options) to enhance protection against common web attacks.
  2. Publish a dedicated security policy and incident response page to improve transparency and readiness.
  3. Create and maintain a security.txt file to facilitate vulnerability disclosure and communication.
  4. Investigate and resolve the missing WHOIS data issue to improve domain legitimacy and trust.
  5. Enhance accessibility features to meet compliance standards and improve user experience for all visitors.

Contact details published on the site

Addresses
Legal name
C-energy s.r.o.
VAT number
CZ25106481
Registration number
251 06 481
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
C-energy s.r.o.
Description
C-energy s.r.o. operates a modern energy production facility in Planá nad Lužnicí, Czech Republic, providing stable and affordable heat and electricity primarily for the Tábor agglomeration and supporting the Czech transmission system operator ČEPS. The company is part of the C-Energy Group, an energy holding focused on ecological and efficient energy sources, investing heavily in modernization and sustainability.
Key services
Electricity generation, Heat supply, Battery energy storage, Support services for transmission system operator
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, jQuery, Google Fonts (Barlow), Cookie consent script from cookie.nexgen.cz
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • Secure form with anti-spam hidden field

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Marketing tools
Cookie consent management
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 rich content about the company and its services
  2. No WHOIS data available, which is a concern for domain legitimacy
  3. Clear privacy and cookie policies with consent mechanisms implemented
  4. Contact information is complete and professional
  5. No visible security policy or incident response information
  6. Modern website design with good navigation and mobile optimization
  7. No signs of adult or questionable content
  8. No third-party analytics or tracking scripts detected beyond cookie consent
  9. Use of ISO certification images indicates some level of quality assurance
Technical notes

Notes

The website uses modern HTML5, CSS3, and JavaScript with jQuery and Google Fonts integration. It includes a cookie consent management script from a third-party provider. The site is mobile optimized with responsive design and good navigation clarity. Performance is moderate with no major issues detected. No CMS or hosting provider information was found. The site lacks advanced frameworks or platforms but maintains a clean and professional technical implementation. Opportunities exist to improve security headers and accessibility compliance to reduce technical risks.
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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