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Security report for lehmler-welschneudorf-mde.de

Bernd Lehmler GmbH · Energy · Germany

Medium risk. 3 critical or high findings in GDPR outside view, SSL/TLS and 1 other check.

Security score

71/100

Risk levelMedium

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

Bernd Lehmler GmbH is a certified specialist company providing comprehensive house technology and bathroom renovation services in the Koblenz and Montabaur region of Germany. As part of the MEISTER DER ELEMENTE network, the company offers a full range of services including pellet stoves, gas and oil heating systems, water treatment, ventilation solutions, and bathroom renovations. Their business model emphasizes fixed-price offers, centralized project coordination, and high-quality craftsmanship, targeting both private and commercial customers locally. The website reflects a professional and consistent brand image with clear contact information and a strong local market presence. Technically, the website is built on a modern CMS platform with a CDN for content delivery, uses HTML5, CSS3, JavaScript, and SystemJS, and integrates Matomo analytics with privacy-conscious configurations such as IP anonymization and cookie consent mechanisms. The site is mobile-optimized and provides a good user experience with clear navigation and relevant content. However, there is room for improvement in security headers and accessibility features. From a security perspective, the site enforces HTTPS and employs a cookie consent mechanism compliant with GDPR. No critical vulnerabilities or exposed sensitive data were detected. The WHOIS data indicates a legitimate domain registration with no privacy protection, consistent with a transparent business. The absence of explicit security policies or incident response contacts suggests an opportunity to enhance trust and compliance. Overall, the website presents a low-risk profile with good privacy compliance and business credibility. Strategic recommendations include implementing additional security headers, publishing a vulnerability disclosure policy, and enhancing accessibility to further strengthen the security posture and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 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

3 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.

    • 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. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

  3. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Weak SPF Policy

      SPF record has permissive policy allowing any server to send email

      What to do: Use -all or ~all qualifier for better email security

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

Keep watching lehmler-welschneudorf-mde.de

This scan found 24 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
70
Email security
70
DNS health
45
Network security
100
GDPR outside view
68
Average
71

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

Bernd Lehmler GmbH operates as a regional specialist in the energy sector, focusing on house technology and bathroom renovation services. Their competitive advantage lies in being part of the MEISTER DER ELEMENTE network, which provides branding strength and collective purchasing benefits. The business model centers on delivering comprehensive, fixed-price solutions with end-to-end project management, appealing to both residential and commercial clients. Revenue streams likely include installation, maintenance, and consulting services. The company maintains a partnership ecosystem including related domains such as www.lehmler.de and www.die-badgestalter.de, enhancing service offerings and customer reach. Growth indicators include a detailed online presence, social media engagement, and a readiness to serve emergency needs outside regular hours. Operationally, the company emphasizes quality, reliability, and customer-centric service, positioning itself as a trusted local provider.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and a comprehensive cookie consent mechanism that respects user privacy and complies with GDPR. The use of Matomo analytics with IP anonymization further supports privacy protection. However, the absence of explicit security headers such as Content Security Policy (CSP), X-Frame-Options, and HSTS reduces the overall security hardening. No signs of exposed sensitive data, malware, or phishing were found. The lack of a published security policy or incident response contact channels indicates a gap in formal security governance and incident management readiness. Overall, the security maturity is good but could be improved by adopting additional best practices and transparency measures.

Recommendations

  1. Implement security headers including CSP, HSTS, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Publish a formal security policy and incident response contact information to improve transparency and readiness.
  3. Introduce a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
  4. Enhance website accessibility features to comply with standards and improve user experience for all visitors.
  5. Regularly audit third-party scripts and libraries to ensure no vulnerabilities are introduced and maintain up-to-date components.

Contact details published on the site

Addresses
Legal name
Bernd Lehmler GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Bernd Lehmler GmbH
Description
Bernd Lehmler GmbH ist ein zertifizierter Fachbetrieb für moderne Haus- und Heizungstechnik im Raum Koblenz und Montabaur. Das Unternehmen bietet Pelletöfen, Gas- und Ölheizungen, Wasseraufbereitung, Lüftungslösungen, Badsanierungen und umfassende Haustechnik-Dienstleistungen inklusive Beratung, Planung, Ausführung, Wartung und Instandsetzung.
Key services
Pelletöfen, Gas- und Ölheizungen, Wasseraufbereitung, Lüftungslösungen, Badsanierung, Beratung, Planung, Ausführung, Wartung
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, SystemJS, Matomo Analytics
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with opt-in for analytics and external content
  • IP anonymization in Matomo analytics

Analytics and tracking

Services
Matomo
Tracking level
minimal
Privacy practices
good

Advertising

Tracking pixels
Matomo
Transparency
basic

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. Comprehensive cookie consent mechanism is implemented.
  3. Privacy policy is linked externally but clearly referenced.
  4. No terms of service found on the analyzed page.
  5. Contact information is prominently displayed and consistent.
  6. Use of Matomo analytics with anonymized IP addresses indicates privacy awareness.
  7. No explicit security headers detected in provided data; potential area for improvement.
  8. Website uses a professional CMS and CDN infrastructure.
  9. Social media presence limited to Instagram for the company.
  10. Content is professional, relevant, and well-structured for target audience.
Technical notes

Notes

The website is built using a modern web stack including HTML5, CSS3, JavaScript, and SystemJS module loader. It uses a proprietary CMS identified as Websitemanager and leverages a CDN (cdn.marcapo.com) for asset delivery, which supports performance and scalability. Matomo analytics is integrated with privacy-focused configurations. The site is mobile-optimized and features responsive design elements. Performance is moderate, with no major issues detected. Technical debt appears low, but the absence of some security headers and limited accessibility features suggest areas for modernization. The use of iframes for scheduling and blog content indicates modular content management but requires careful security considerations. Overall, the technical infrastructure is solid with opportunities for incremental improvements to security and accessibility.
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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