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Security report for sonnleitner.de

Sonnleitner Holzhausbauwerke GmbH & Co. KG · Real Estate · Germany

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

52/100

Risk levelMedium

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

Sonnleitner Holzhausbauwerke GmbH & Co. KG is a well-established Bavarian company specializing in ecological and healthy wooden house construction. With over 50 years of experience and more than 3,600 projects completed, the company offers custom wooden houses, modular buildings, commercial and multi-family wooden constructions, and interior design services. Their focus on sustainable materials, premium quality, and healthy living environments positions them as a regional leader in the wooden house market. The website is professionally designed, content-rich, and provides clear contact information and social media presence, enhancing business credibility. Technically, the website uses modern web technologies including HTML5, CSS3, JavaScript, and the Contao CMS platform. It features responsive design and good SEO practices. However, some security best practices such as explicit security headers and cookie consent mechanisms are missing or not detected, which could be improved to enhance compliance and security posture. The security posture is moderate with HTTPS implied but no visible security headers or incident response information. No WAF or blocking mechanisms were detected, and no vulnerabilities were apparent from the provided data. Privacy compliance is adequate with a comprehensive privacy policy but lacks a cookie consent mechanism. Business credibility is high due to clear company information, certifications, and customer testimonials. Overall, the website is a strong digital asset for Sonnleitner, supporting their market position and customer engagement. Strategic improvements in security headers, cookie consent, and incident response transparency would further strengthen their security and compliance stance.

Scanned

NIS2 and GDPR posture

GDPR outside view
28/ 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

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 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 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';…

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

Keep watching sonnleitner.de

This scan found 25 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
55
Email security
70
DNS health
60
Network security
20
GDPR outside view
28
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

Sonnleitner operates in the real estate and manufacturing sectors, focusing on ecological wooden house construction. Their business model centers on manufacturing and selling custom wooden houses and related interior design services. The company targets private home buyers, commercial clients, and environmentally conscious consumers. With a history dating back to 1919, Sonnleitner has established itself as a pioneer and trusted brand in Bavaria. Their competitive advantages include patented construction methods, high-quality materials, and comprehensive customer support. The company leverages certifications and awards to build trust and differentiates itself through sustainability and health-focused building practices. The website reflects a mature digital presence with integration of social media and analytics, supporting marketing and customer engagement efforts.

Security posture

The website demonstrates a moderate security maturity level. HTTPS is used, ensuring encrypted communications. However, no explicit security headers such as Content-Security-Policy, X-Frame-Options, or X-Content-Type-Options were detected, which are recommended to mitigate common web vulnerabilities. There is no visible security policy or incident response contact information, which limits transparency and preparedness for security incidents. No vulnerabilities or exposed sensitive data were found in the content. Privacy compliance is partial, with a comprehensive privacy policy but no cookie consent mechanism detected, which may pose GDPR compliance risks. Overall, the security posture is adequate but could be improved by implementing recommended headers, publishing security policies, and adding cookie consent mechanisms.

Recommendations

  1. Implement standard security headers (Content-Security-Policy, X-Frame-Options, X-Content-Type-Options) to enhance protection against common web attacks.
  2. Add a cookie consent banner/mechanism to comply fully with GDPR and improve user privacy transparency.
  3. Publish a clear security policy and incident response contact information to improve trust and preparedness.
  4. Regularly audit third-party scripts and libraries to ensure no vulnerable components are used.
  5. Enhance accessibility features and conduct periodic security testing to maintain a strong security posture.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Sonnleitner Holzhausbauwerke GmbH & Co. KG
Description
Sonnleitner is a specialist in ecological and healthy wooden house construction based in Bavaria, Germany. They offer custom-made wooden houses including single-family homes, multi-family homes, commercial and object construction, and modular building. The company emphasizes sustainable materials, high-quality craftsmanship, and healthy living environments.
Key services
Custom wooden house construction, Modular wooden houses, Commercial and multi-family wooden buildings, Interior design and furniture manufacturing, Consultation and planning, Customer service and support
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Swiper.js (slider), Contao CMS (inferred from schema context), Google Analytics (indicated by script)
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS usage (implied by base href https://)
  • No visible exposed sensitive data
  • No inline sensitive credentials

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed and content-rich.
  2. Strong focus on ecological and healthy wooden house construction.
  3. Multiple certifications and awards displayed, enhancing trust.
  4. Contact information is clearly available with phone and email.
  5. No visible security policy or incident response info.
  6. No cookie consent banner detected, which may be a GDPR compliance gap.
  7. Use of modern JavaScript libraries for UI elements.
  8. No WAF or blocking detected; full content accessible.
  9. Social media presence on major platforms.
  10. WHOIS data is minimal but domain appears legitimate.
Technical notes

Notes

The website is built using modern web standards including HTML5, CSS3, and JavaScript, with the Contao CMS platform inferred from structured data. It uses Swiper.js for interactive sliders and integrates Google Analytics for visitor tracking. The site is responsive and optimized for mobile devices, with good SEO practices such as meta descriptions and canonical links. Performance is moderate, with preloading of CSS and deferred JavaScript loading. Accessibility is basic but could be improved. No major technical debt or outdated technologies were detected. Hosting provider details are not explicit, but DNS name servers indicate use of agenturserver hosting services. Overall, the technical infrastructure supports a professional and user-friendly website experience.
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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