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Security report for thermona.eu

Thermona, spol. s r.o. · Energy · Czech Republic

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 3 other checks.

Security score

62/100

Risk levelMedium

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

Thermona, spol. s r.o. is a well-established Czech manufacturer specializing in gas and electric boilers, including condensing and atmospheric models under the THERM brand. With a history dating back to 1990, the company has expanded its market presence to over twenty countries, offering comprehensive heating solutions including control systems and accessories. The website reflects a professional and consistent brand image, targeting residential and commercial customers seeking reliable heating products. Technically, the site employs a mature technology stack based on ASP.NET WebForms and Bootstrap, with integration of common web libraries and Google services for analytics and fonts. Security posture is moderate with HTTPS usage and no evident vulnerabilities, though security headers and CMS updates could be improved. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms. Overall, the website and business demonstrate a credible and trustworthy profile with room for technical modernization and enhanced security practices.

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

6 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 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 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. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • High

      No DMARC record found

      DMARC provides email authentication and reporting

      What to do: Add DMARC record: "v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com"

  4. 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

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

Keep watching thermona.eu

This scan found 18 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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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
45
Email security
80
DNS health
85
Network security
20
GDPR outside view
80
Average
62

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

Thermona holds a strong market position as a traditional Czech manufacturer with a focus on quality and reliability. Its business model revolves around manufacturing and direct sales supported by a network of country-specific partner sites. The company targets a broad audience including homeowners and commercial entities requiring heating solutions. Revenue streams likely include product sales, installation services, and after-sales support. The presence of multiple localized domains indicates a strategic approach to international markets. The company emphasizes compliance with industry standards and customer satisfaction, which supports its competitive advantage. Growth indicators include active news updates and participation in international exhibitions. The partnership ecosystem is robust with dedicated country sites, enhancing market penetration and customer support.

Security posture

The website demonstrates a moderate security maturity level. HTTPS is implemented, and no sensitive data is exposed in the HTML content. However, the absence of visible security headers such as Content Security Policy, HSTS, and X-Frame-Options suggests potential areas for improvement. The use of an older jQuery version (1.11.3) may expose the site to known vulnerabilities if not properly patched. Forms appear to use POST methods, but no explicit CSRF tokens or advanced protections are visible in the source. There is no evidence of an incident response policy or dedicated security contact channels. Privacy policies and cookie consent mechanisms are in place, indicating awareness of GDPR compliance. Overall, the security posture is adequate for a commercial site but would benefit from enhanced header configurations, updated libraries, and formalized incident response readiness.

Recommendations

  1. Implement comprehensive security headers including CSP, HSTS, X-Frame-Options, and X-XSS-Protection to mitigate common web attacks.
  2. Upgrade jQuery and other JavaScript libraries to the latest secure versions to reduce vulnerability exposure.
  3. Add CSRF protection tokens to all forms to prevent cross-site request forgery attacks.
  4. Establish and publish an incident response policy and provide dedicated security contact channels (e.g., security@ or abuse@ emails).
  5. Conduct regular security audits and penetration testing to identify and remediate potential vulnerabilities.
  6. Enhance accessibility features and SEO metadata to improve user experience and search engine ranking.
  7. Maintain transparency in data retention policies and update privacy documentation accordingly.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Thermona, spol. s r.o.
Description
Thermona is a leading manufacturer of wall-mounted gas boilers, gas condensing boilers, and electric boilers under the THERM brand, providing heating and water heating solutions. The company offers control systems, DHW tanks, and flue systems, emphasizing quality, compliance with directives, and customer satisfaction.
Key services
Manufacture of gas suspension boilers, Manufacture of condensing boilers, Manufacture of electric boilers, Delivery of control systems, Delivery of DHW tanks, Delivery of flue systems, Provision of boiler rooms and cascade boiler systems
Content quality
good
Branding
consistent

Technology

Stack
jQuery 1.11.3, Bootstrap CSS and JS, Font Awesome 4.4.0, Google Fonts (Source Sans Pro, Roboto, Open Sans), jQuery Fancybox 2.1.5, Google Maps API, CMSPages (likely Kentico CMS or similar .NET CMS), ASP.NET WebForms
Frameworks
Bootstrap, ASP.NET WebForms
Platforms
Windows Server (implied by ASP.NET WebForms usage)
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • Use of HTTPS (implied by https URLs)
  • No exposed sensitive data in HTML
  • Forms use POST method

Analytics and tracking

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

Advertising

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
  2. No WAF or blocking detected
  3. WHOIS data unavailable publicly, likely privacy protected
  4. Company is a traditional Czech manufacturer with international reach
  5. Multiple language and country-specific subdomains exist
  6. Use of modern web technologies and CMS
  7. Presence of privacy and cookie policies with consent mechanisms
  8. Contact information and forms are available and functional
  9. No visible security or privacy red flags
Technical notes

Notes

The website is built on ASP.NET WebForms with Bootstrap for responsive design and jQuery for client-side scripting. It uses Google Fonts and Font Awesome for typography and icons. The presence of multiple country-specific domains suggests a multi-site architecture likely managed via a CMS platform, possibly Kentico or a similar .NET CMS. Performance is moderate with asynchronous loading of analytics scripts and use of CDN-hosted resources. Mobile optimization is good, with responsive menus and layouts. Accessibility is basic but could be improved with ARIA roles and better keyboard navigation support. SEO is supported by meta descriptions and structured navigation. Technical risks include reliance on older JavaScript libraries and potential CMS vulnerabilities if not regularly updated. Hosting details are not explicit but likely Windows-based given the technology stack.
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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