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Security report for krauss-haustechnik.com

Dieter Krauss GmbH · Energy · Germany

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

53/100

Risk levelMedium

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

Dieter Krauss GmbH is a small, family-run business specializing in heating, sanitation, ventilation, and renewable energy solutions, operating primarily in Klein Offenseth-Sparrieshoop, Germany. The company offers a broad range of services including bathroom installations, heating systems, ventilation and air conditioning, photovoltaic and solar thermal systems, as well as gas heating services through its Krauss GAS Center. The website reflects a professional and consistent brand image with clear contact information and service descriptions, targeting local residential and commercial customers. Technically, the website is built using Bootstrap and jQuery, providing a responsive and user-friendly experience. However, there is no evidence of advanced CMS or hosting details. The site lacks modern security headers and cookie consent mechanisms, and no analytics or tracking tools are detected, indicating minimal user tracking. Performance is moderate with good mobile optimization but basic accessibility and SEO features. From a security perspective, the site does not show critical vulnerabilities but lacks HTTPS confirmation and security headers, which are recommended for improved protection. The absence of a privacy policy with GDPR compliance details and cookie consent reduces privacy compliance. WHOIS data is missing, raising questions about domain registration legitimacy, although the website content and business information appear trustworthy and professional. Overall, the site is a solid representation of a small regional business with room for improvement in security, privacy compliance, and domain registration transparency.

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

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 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';…

  2. 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

    • 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 krauss-haustechnik.com

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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
70
DNS health
70
Network security
40
GDPR outside view
53
Average
53

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 holds a strong regional presence with nearly 90 years of family business tradition in the energy and home technology sector. Its competitive advantage lies in its comprehensive service offerings and deep local market knowledge. The business model focuses on installation, maintenance, and repair services for heating, sanitation, and renewable energy systems. Revenue streams likely derive from service contracts, new installations, and maintenance agreements. The target customers are primarily homeowners and small businesses in the local area. The company maintains a straightforward partnership ecosystem with no visible subsidiaries or parent companies. Growth indicators include a well-maintained website and clear service descriptions, but lack of digital marketing or analytics suggests limited online expansion efforts.

Security posture

The current security posture is basic with no detected critical vulnerabilities or exposed sensitive data. However, the lack of HTTPS confirmation, absence of security headers, and missing cookie consent mechanisms indicate gaps in security best practices and privacy compliance. There is no published incident response or vulnerability disclosure policy, which limits transparency and readiness for security incidents. The minimal use of tracking and analytics reduces privacy risks but also limits business intelligence capabilities. Overall, the security maturity level is low to moderate, suitable for a small business but requiring improvements to meet modern standards and regulatory requirements.

Recommendations

  1. Implement HTTPS with a valid SSL/TLS certificate and enforce secure connections site-wide.
  2. Add standard security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  3. Publish a comprehensive privacy policy including GDPR compliance statements and data handling practices.
  4. Introduce a cookie consent banner/mechanism to comply with EU privacy regulations.
  5. Establish and publish a vulnerability disclosure policy and incident response contact information to improve security transparency and readiness.

Contact details published on the site

Addresses
Legal name
Dieter Krauss GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Dieter Krauss GmbH
Description
Dieter Krauss GmbH ist ein familiengeführtes Unternehmen in der vierten Generation, spezialisiert auf Sanitär-, Heizungs- und Klimatechnik sowie erneuerbare Energien. Das Unternehmen bietet Dienstleistungen wie Bäder, Heizungsanlagen, Lüftungsbau, Klimaanlagen, Photovoltaik, Solarthermie und Bauklempnerei an. Zusätzlich betreibt es das Krauss GAS Center mit Service rund um Gasheizungen, Wartungen, Reparaturen und Dichtigkeitsprüfungen.
Key services
Bäder, Heizungsanlagen, Lüftungsbau und Klimaanlagen, Photovoltaik und Solarthermie, Bauklempnerei, Gasheizungsservice
Content quality
good
Branding
consistent

Technology

Stack
Bootstrap, jQuery, HTML5, CSS3
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
60/100
Good practices seen
  • No exposed sensitive data in HTML
  • No forms detected that collect sensitive data

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is in German language targeting German customers
  2. No forms present on the homepage or main content
  3. No social media links detected
  4. Contact information is clearly presented with emails and phone numbers
  5. No privacy or cookie consent banners detected
  6. No security headers or advanced security features detected
  7. No analytics or tracking scripts detected
  8. Website uses Bootstrap and jQuery for frontend
  9. No CMS or hosting provider information found
  10. No explicit or adult content present
Technical notes

Notes

The website uses a classic Bootstrap and jQuery frontend stack, ensuring responsive design and compatibility with modern browsers. The HTML structure is valid and includes meta tags for viewport and description, supporting basic SEO. However, the site lacks advanced CMS features or dynamic content management, indicating a static or simple backend. Performance is moderate with no heavy scripts detected, but no explicit hosting or CDN information is available. Accessibility features are basic, with some ARIA roles missing and no evident keyboard navigation aids. SEO optimization is minimal, with no Open Graph or structured data markup present. The site could benefit from modernization including improved accessibility, SEO enhancements, and integration of analytics for business insights.
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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