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Security report for jeanmueller.de

JEAN MÜLLER · Energy · Germany

Medium risk. 5 critical or high findings in Security headers, SSL/TLS and 1 other check.

Security score

59/100

Risk levelMedium

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

JEAN MÜLLER is a well-established German company specializing in the manufacture and distribution of fuse-based switching devices, enclosure technology, and energy data acquisition solutions primarily for the energy sector. With over 125 years of history and a broad international presence through subsidiaries and partners, the company positions itself as a leader in safety and reliability in low-voltage distribution. The website reflects a mature digital presence with comprehensive product information, news, events, and customer support resources. Technically, the site is built on WordPress with modern plugins and is optimized for performance, mobile responsiveness, and SEO. Security posture is strong with HTTPS, cookie consent mechanisms, and no visible vulnerabilities, though some security headers could be improved. The absence of WHOIS data is a notable anomaly that slightly impacts trust but is mitigated by the professional and consistent business presentation. Overall, the site demonstrates a high level of digital maturity and business credibility.

Scanned

NIS2 and GDPR posture

GDPR outside view
95/ 100 · Low
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

5 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. 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. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • High

      High-Risk Service Exposed: FTP

      Port 21 (FTP) is publicly accessible - FTP - Often unencrypted file transfer

      What to do: Consider restricting access to FTP or implementing strong authentication

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

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

Keep watching jeanmueller.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.

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

Email alerts on material changes and an exportable JSON history of every change.

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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
80
Network security
20
GDPR outside view
95
Average
59

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, targeting utilities, industrial clients, and electrical distributors. Its business model focuses on manufacturing and supplying high-quality electrical components with a strong emphasis on safety and innovation. The presence of multiple subsidiaries across Europe, Asia, and Oceania indicates a global market reach. The company leverages digital tools such as an online product catalog and app to enhance customer engagement. Strategic partnerships and a dense sales network support its market penetration. The website content and structure suggest a focus on professional B2B relationships and technical excellence.

Security posture

The website employs HTTPS with a good SSL configuration, uses a cookie consent mechanism compliant with GDPR, and integrates hCaptcha for form security. While some recommended security headers like Content-Security-Policy and X-Frame-Options are not explicitly detected, the overall security posture is solid with no exposed sensitive data or vulnerable libraries identified. The lack of a published security policy or incident response contact is a gap. No security.txt or vulnerability disclosure information is found, which could be improved to enhance transparency and trust.

Recommendations

  1. Implement and enforce Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options headers to strengthen security.
  2. Publish a dedicated security policy and incident response contact information to improve transparency and readiness.
  3. Consider adding a security.txt file to facilitate vulnerability reporting and responsible disclosure.
  4. Investigate and resolve the missing WHOIS data to improve domain legitimacy and trustworthiness.
  5. Maintain regular updates of WordPress core and plugins to mitigate potential vulnerabilities.

Contact details published on the site

Addresses
Legal name
Jean Müller GmbH Elektrotechnische Fabrik
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
JEAN MÜLLER
Description
JEAN MÜLLER bietet sichere Schaltgeräte und Gehäusetechnik, sowie Energiedatenerfassung für die Niederspannungsverteilung seit über 125 Jahren.
Key services
Manufacture of fuse-based switching devices, Enclosure technology, Energy data acquisition, Customer consulting and support
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, Yoast SEO plugin, GeneratePress theme, jQuery, Matomo analytics, Borlabs Cookie plugin, Google Maps integration
Frameworks
WordPress CMS
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • Use of hCaptcha for forms

Analytics and tracking

Services
Matomo
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Matomo
Marketing tools
Borlabs Cookie, Google Tag Manager (implied)
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and well maintained
  2. Content is comprehensive and relevant to energy sector
  3. Multiple international subsidiaries and contact points
  4. Privacy and cookie policies are present and GDPR compliant
  5. No visible security or content blocking issues
  6. WHOIS data missing, which is unusual and warrants further investigation
Technical notes

Notes

The website is built on WordPress using the GeneratePress theme and Yoast SEO plugin, indicating a modern and SEO-friendly infrastructure. It uses jQuery and Matomo for analytics, with Borlabs Cookie managing consent. The site is optimized for mobile devices and performance, with lazy loading and preconnect hints. Integration with Google Maps and external product catalog domains enhances functionality. The technical implementation is robust, though hosting provider details are not explicitly identified. Overall, the technical stack supports a professional and scalable online presence.
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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