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Security report for bohn-heizung-sanitaer.de

Arfst Bohn GmbH · Energy · Germany

High risk. 8 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

44/100

Risk levelHigh

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

Arfst Bohn GmbH is a small, family-owned specialist company based on Amrum island, Germany, providing heating, sanitation, ventilation, climate technology, solar energy solutions, and related services. The company emphasizes quality, reliability, and comprehensive customer support from planning to installation and maintenance. Their market position is that of a trusted local expert with a focus on renewable energy and modern heating technologies. Technically, the website uses a modern but straightforward stack including jQuery, Foundation framework, and various UI libraries, hosted likely on a standard web hosting platform. The site is mobile-optimized and provides clear navigation and content relevant to its target audience. Security posture is moderate with HTTPS implied but lacks explicit security headers and detailed security policies. Privacy compliance is good with a cookie consent mechanism and a privacy policy present. Overall, the website is professional and trustworthy, though improvements in security headers and incident response information are recommended.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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

8 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 Cookie Policy found

      GDPR requires clear information about cookie usage

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

  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';…

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  • TLS certificates and expiry
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  • 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
57
Security headers
15
Email security
70
DNS health
60
Network security
20
GDPR outside view
40
Average
44

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 operates in the energy sector, focusing on heating and sanitation services with an emphasis on renewable energy integration such as solar and heat pumps. Their business model is service and installation oriented, targeting residential and commercial customers on Amrum. The presence of a Buderus partner logo indicates a strategic partnership with a recognized heating technology brand, enhancing credibility. The company maintains a local market presence with no indication of subsidiaries or parent companies. Growth potential lies in expanding renewable energy services and leveraging government subsidies. The website content and structure support customer engagement and service promotion effectively.

Security posture

The website demonstrates a basic security posture with HTTPS usage and a cookie consent mechanism aligned with GDPR requirements. However, it lacks visible HTTP security headers such as Content Security Policy, HSTS, and X-Frame-Options, which are important for mitigating common web vulnerabilities. No incident response or security policy pages are present, and no dedicated security contact channels are provided. There is no evidence of vulnerability disclosure or security certifications. The absence of analytics scripts reduces tracking risks but also limits insight into user behavior. Overall, the security maturity is moderate but could be improved by implementing best practices and transparency.

Recommendations

  1. Implement HTTP security headers including CSP, HSTS, X-Frame-Options, and X-XSS-Protection to enhance protection against common attacks.
  2. Publish a clear security policy and incident response contact information to improve transparency and readiness.
  3. Conduct a security audit to identify and remediate any potential vulnerabilities in the web application and server configuration.
  4. Enhance privacy compliance by detailing data retention policies and providing explicit information about data processing activities.
  5. Consider integrating analytics with privacy-respecting configurations to better understand user engagement and improve service offerings.

Contact details published on the site

Addresses
Legal name
Arfst Bohn GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Arfst Bohn GmbH
Description
Fachbetrieb für Heizung, Sanitär, Lüftung, Klimatechnik, Kamine, Solar und Serviceleistungen auf Amrum. Familienunternehmen mit langjähriger Erfahrung, spezialisiert auf Planung, Montage und Wartung von Heizsystemen und Sanitäranlagen.
Key services
Heizung, Kamine, Lüftung, Klimatechnik, Bad & Sanitär, Solar, Service & Wartung, Förderservice Heizung
Content quality
good
Branding
consistent

Technology

Stack
jQuery 3.6.3, jQuery UI 1.13.2, Foundation CSS Framework, FontAwesome, Material Icons, AOS (Animate On Scroll), jQuery ContextMenu, Fresco lightbox, TwentyTwenty image comparison
Frameworks
Foundation
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
60/100
Good practices seen
  • HTTPS enforced (implied by canonical URL https://)
  • Cookie consent banner with opt-in/out
  • No exposed sensitive data in HTML

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is in German targeting local customers on Amrum island, Germany.
  3. Clear contact information and service offerings are presented.
  4. Cookie consent mechanism is implemented with detailed user options.
  5. No explicit terms of service or security policy pages found.
  6. No analytics or tracking scripts detected in HTML content.
  7. Technical stack is modern but basic, relying on jQuery and Foundation.
  8. No visible security headers or advanced security configurations.
  9. Business appears legitimate and professional with consistent branding.
Technical notes

Notes

The website is built on a custom CMS platform (Websites4Handwerker.de) using a combination of jQuery, Foundation CSS framework, and several UI enhancement libraries such as AOS for animations and Fresco for lightbox functionality. The site is responsive and mobile-friendly with a clear navigation structure. Performance is moderate, with multiple large images and scripts that could be optimized. No modern JavaScript frameworks like React or Angular are used, indicating a traditional web development approach. Hosting details are not explicit but likely standard shared hosting given the use of t-online.de DNS servers. There is room for modernization and performance optimization, including image compression and script minification.
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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