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Security report for vaillant150.com

Vaillant Group · Energy · Germany

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

Security score

52/100

Risk levelMedium

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

Vaillant Group is a globally recognized leader in heating technology, celebrating 150 years of innovation and sustainability. The website analyzed is a dedicated campaign site highlighting the company's mission, vision, and sustainability initiatives, including partnerships with WWF and SOS Children's Villages. The company emphasizes eco-friendly heating solutions such as heat pumps, hybrid systems, and hydrogen heating, positioning itself as a market leader in the energy sector. Technically, the site employs modern web technologies, is well-optimized for mobile, and integrates GDPR-compliant consent management. Security posture is strong with HTTPS enforcement and domain transfer protections, though DNSSEC is not enabled. No critical vulnerabilities or suspicious content were detected. Overall, the site reflects a professional, trustworthy, and mature digital presence aligned with Vaillant's corporate values.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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. 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.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  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 Policy found

      GDPR requires clear information about cookie usage

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

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

Keep watching vaillant150.com

This scan found 27 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.

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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
72
Security headers
15
Email security
60
DNS health
70
Network security
40
GDPR outside view
53
Average
52

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 with a focus on sustainable heating solutions. Their business model centers on manufacturing and distributing innovative heating technologies globally. The company targets homeowners, trade professionals, and environmentally conscious consumers. Strategic partnerships with NGOs like WWF and SOS Children's Villages enhance their corporate social responsibility profile. The website serves as a marketing and informational platform for their 150th anniversary, reinforcing brand loyalty and market positioning. The domain is relatively new, indicating a specialized campaign rather than the main corporate site. The company demonstrates strong branding consistency and trust signals, including long business history and global reach.

Security posture

The website exhibits a mature security posture with HTTPS enforced and clientTransferProhibited domain status. Use of a Consent Manager CMP indicates GDPR compliance efforts. However, no explicit security policy or incident response contacts are published on this site. DNSSEC is not enabled, which is a recommended improvement. No exposed sensitive data or vulnerable libraries were detected. The site lacks a security.txt file for vulnerability disclosure. Overall, the security measures are adequate for a marketing site but could be enhanced with more transparency and DNS security.

Recommendations

  1. Enable DNSSEC to improve DNS security and prevent spoofing.
  2. Publish a dedicated security policy and incident response contact information.
  3. Implement a security.txt file to facilitate vulnerability reporting.
  4. Review and ensure all recommended security headers are present and properly configured.
  5. Consider adding clear company contact information on the campaign site to improve trust and compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Vaillant Group
Description
Vaillant Group is a leading global manufacturer of heating technology, specializing in heat pumps, gas appliances, and eco-friendly heating solutions. The company emphasizes innovation, sustainability, and partnership, celebrating 150 years of operation with a focus on the future of heating and climate care.
Key services
Heat pumps, Hybrid heating systems, Hydrogen heating solutions, Production and development of sustainable heating technology
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, SVG graphics, Consent Manager CMP, Google Tag Manager
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • Use of Consent Manager for GDPR compliance
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
Consent Manager CMP
Transparency
good

Site quality

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

Key observations

  1. Website is a dedicated campaign site for Vaillant's 150th anniversary focusing on current mission and sustainability.
  2. Strong emphasis on sustainability, innovation, and corporate social responsibility.
  3. Use of modern web technologies and compliance with GDPR via Consent Manager.
  4. No direct contact information or security policy details visible on this page.
  5. No signs of malicious or suspicious content.
  6. Domain is new but consistent with a marketing campaign rather than the main corporate site.
Technical notes

Notes

The website uses modern JavaScript, SVG graphics, and integrates third-party services like Google Tag Manager and Consent Manager CMP for analytics and privacy compliance. The CMS appears to be FirstSpirit, a professional enterprise CMS. The site is well-optimized for mobile devices and demonstrates fast loading times. SEO practices are good with proper meta tags and structured navigation. Hosting and DNS are managed by reputable providers. No technical debt or legacy technology indicators were found. Opportunities exist to enhance DNS security and publish more explicit security policies.
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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