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Security report for teplarny.cz

Teplárny Brno, a.s. · Energy · Czech Republic

High risk. 7 critical or high findings in Network security, Security headers and 2 other checks.

Security score

49/100

Risk levelHigh

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

Teplárny Brno, a.s. is a well-established energy company based in the Czech Republic, specializing in the production and reliable supply of ecological heat, electricity, and gas primarily serving the city of Brno and its surroundings. With a history spanning approximately 95 years, the company holds a strong regional market position and offers a broad portfolio of energy-related services including electromobility, cold supply, emergency services, and energy audits. The website reflects a professional and customer-focused approach, providing clear contact channels and comprehensive service information. Technically, the website employs modern web technologies such as JavaScript, Google Tag Manager, Google Analytics, and Facebook Pixel for analytics and marketing purposes. The site is mobile-optimized with good SEO practices and a cookie consent mechanism that complies with GDPR requirements. However, no explicit security policy or incident response information is published, which could be improved to enhance transparency and trust. From a security perspective, the site uses HTTPS with good SSL configuration and implements cookie consent controls, but lacks advanced security headers and a public vulnerability disclosure channel. No critical vulnerabilities or exposed sensitive data were detected. Overall, the security posture is solid but could benefit from formalized policies and incident response details. The overall risk assessment is low, with the website demonstrating high professionalism, compliance, and trustworthiness. Strategic recommendations include publishing a security policy, adding incident response contacts, implementing security.txt, and enhancing accessibility and security headers to further strengthen the security and compliance posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
73/ 100 · Medium
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

7 findings rated critical or high. Fix these first.

  1. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • Critical

      Critical Service Exposed: MySQL

      Port 3306 (MySQL) is publicly accessible - MySQL - Database server

      What to do: Immediately restrict access to MySQL using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

  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';…

  3. 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

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

Keep watching teplarny.cz

This scan found 22 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

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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
85
DNS health
85
Network security
0
GDPR outside view
73
Average
54
After the cap
49

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 · found on this site
  • 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

Teplárny Brno operates as a key regional energy supplier with a diversified service offering that extends beyond traditional heat and electricity supply to include innovative services like electromobility and energy consulting. Their business model focuses on serving residential customers, businesses, and large consumers such as SVJs with tailored energy solutions. The company leverages its long-standing market presence and local infrastructure to maintain competitive pricing and customer loyalty. The website's content and structure indicate a mature digital presence with active engagement through news updates and social media channels. The absence of parent or subsidiary companies suggests an independent operation focused on regional dominance. The company’s strategic partnerships and community involvement further reinforce its market position and brand trust.

Security posture

The website demonstrates a moderate to high level of security maturity with enforced HTTPS, cookie consent compliance, and no visible exposure of sensitive data. The use of Google Tag Manager and Facebook Pixel indicates tracking and marketing sophistication but also necessitates careful privacy management, which the site addresses through consent mechanisms. The lack of published security policies, incident response contacts, and vulnerability disclosure channels represents gaps in transparency and readiness. No critical vulnerabilities or outdated libraries were detected in the provided content. Security headers are not explicitly visible, suggesting room for improvement in defense-in-depth strategies. Overall, the security posture is adequate for the business type but could be enhanced by formalizing security governance and incident management.

Recommendations

  1. Publish a comprehensive security policy on the website to inform users and stakeholders.
  2. Provide clear incident response contact information, such as a dedicated security or abuse email.
  3. Implement and publish a security.txt file to facilitate responsible vulnerability disclosure.
  4. Enhance website security by adding HTTP security headers like Content-Security-Policy and X-Frame-Options.
  5. Improve accessibility features to meet higher standards and broaden user inclusivity.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Teplárny Brno, a.s.
Description
Vyrábíme a spolehlivě dodáváme ekologické teplo a elektrickou energii. Obyvatelé města Brna se na nás spoléhají už 87 let.
Key services
Electricity supply, Gas supply, Heat supply, Electromobility, Cold supply, Emergency services, Energy audits and consulting
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, jQuery, Google Tag Manager, Google Analytics (gtag.js), Facebook Pixel, CSS3, HTML5
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with granular controls
  • No exposed sensitive data in HTML

Analytics and tracking

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

Advertising

Ad networks
Google Ads
Tracking pixels
Facebook Pixel
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 maintained
  2. Comprehensive cookie consent mechanism implemented
  3. Clear contact information with multiple channels
  4. Active social media presence on Facebook, LinkedIn, YouTube
  5. No signs of phishing or malware
  6. No visible security policy or incident response info
  7. Good SEO and metadata usage
  8. No security.txt or vulnerability disclosure found
Technical notes

Notes

The website uses a modern tech stack including JavaScript, jQuery, Google Tag Manager, Google Analytics, and Facebook Pixel for analytics and marketing. The HTML and CSS are valid and well-structured, supporting good SEO and mobile responsiveness. Performance is moderate, with asynchronous loading of scripts to optimize user experience. The CMS is not explicitly identified, suggesting a custom or proprietary solution. There is no indication of legacy or vulnerable libraries. The site integrates cookie consent management with granular user controls, reflecting compliance with privacy regulations. Opportunities exist to improve hosting transparency and implement advanced security headers 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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