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Security report for vaillant.cz

Vaillant · Energy · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

63/100

Risk levelMedium

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

Vaillant.cz is the Czech Republic website for Vaillant, a well-established company specializing in heating and home comfort solutions with over 140 years of experience and German technology development. The website presents a professional design with good content relevance and clear branding, targeting homeowners and businesses seeking heating solutions. Technically, the site uses modern JavaScript frameworks such as Alpine.js, integrates Google Tag Manager and Consent Manager for analytics and GDPR compliance, and is hosted under a reputable registrar. Security posture is moderate with HTTPS implied but lacks explicit security headers and published security policies. Privacy compliance is partial, with a cookie consent mechanism present but no explicit privacy or terms of service pages. Business credibility is high given the domain age, consistent WHOIS data, and professional presentation. Overall, the site is functional and trustworthy but would benefit from enhanced privacy disclosures and security best practices.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 100 · Critical
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. 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

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • 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

  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 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';…

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

Keep watching vaillant.cz

This scan found 23 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
77
Security headers
45
Email security
60
DNS health
85
Network security
100
GDPR outside view
10
Average
63

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

Vaillant operates in the energy sector, focusing on heating and ventilation products. The company leverages its long history and German engineering reputation to maintain a strong market position. The website serves as a product showcase and informational portal, likely supporting direct sales and dealer networks. The absence of direct contact details on the homepage suggests a focus on brand and product awareness rather than direct customer service via the site. The integration of consent management and analytics indicates a mature approach to digital marketing and compliance. No evidence of affiliate or partner domains was found in the HTML content.

Security posture

The website enforces HTTPS and uses consent management tools, which are positive security indicators. However, the absence of explicit security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces the overall security posture. No incident response or vulnerability disclosure information is published, limiting transparency in security management. No vulnerabilities or exposed sensitive data were detected in the analyzed content. The site would benefit from implementing security headers, publishing a security policy, and establishing a vulnerability disclosure program to enhance trust and compliance.

Recommendations

  1. Implement and publish a comprehensive privacy policy and terms of service to improve privacy compliance.
  2. Add security headers including CSP, HSTS, and X-Frame-Options to strengthen security posture.
  3. Publish incident response and vulnerability disclosure information to increase transparency and trust.
  4. Enhance accessibility features to improve user experience for all users.
  5. Regularly audit third-party scripts and tracking tools to ensure compliance and minimize privacy risks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Vaillant
Description
Řešení vytápění na míru vašim potřebám: ✓ Více než 140 let zkušeností ✓ Německý vývoj → Objevte naše výrobky!
Key services
heating solutions, ventilation products, energy efficient home comfort systems
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Consent Manager, Swiper.js
Frameworks
Alpine.js (x-data, x-ref usage)
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS enforced (implied by domain and scripts)
  • Consent management implemented

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Consent Manager
Marketing tools
Consent Manager
Transparency
basic

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
high

Key observations

  1. Website is professionally designed and well-branded
  2. Consent management is implemented indicating GDPR awareness
  3. No explicit privacy policy or terms of service found
  4. No direct contact information or security incident response info found
  5. Use of modern JavaScript frameworks and libraries
  6. No WAF or blocking detected, full content accessible
Technical notes

Notes

The website uses modern JavaScript frameworks (Alpine.js) and libraries (Swiper.js) for interactive UI components. Google Tag Manager and Consent Manager are integrated for analytics and cookie consent management, indicating a focus on data-driven marketing and GDPR compliance. The site is hosted under a reputable registrar with domain age consistent with the company's history. Performance is moderate with deferred script loading and modular JavaScript usage. Mobile optimization is good, but accessibility features are basic. SEO is supported by proper meta tags and canonical links. The site lacks explicit CMS identification but appears custom-built or using a proprietary platform.
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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