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Security report for christoph-heide.de

Christoph Heide · Energy · Germany

Medium risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

58/100

Risk levelMedium

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

Christoph Heide is a well-established German company specializing in building technology services including sanitation, heating, ventilation, and electrical installations. Founded in 1927, the company serves residential and commercial customers primarily in the Heide/Dithmarschen region. Their website reflects a professional and consistent brand presence, highlighting key services such as heat pumps, bathroom renovations, and photovoltaic systems. The company holds certifications like Vaillant Kompetenzpartner and offers guarantees that enhance customer trust. Technically, the website is built on WordPress with modern plugins and technologies such as Slider Revolution, CookieYes for consent management, and Google Site Kit for analytics. The site is mobile-optimized and performs moderately well, with good SEO and accessibility basics. Hosting appears to be on Microsoft Azure, indicated by specific cookies. From a security perspective, the site enforces HTTPS and implements a comprehensive cookie consent mechanism aligned with GDPR requirements. However, some security headers are not explicitly detected and could be improved. No critical vulnerabilities or exposed sensitive data were found. Incident response and explicit security policies are not published, which could be enhanced. Overall, the website presents a low-risk profile with strong business credibility and privacy compliance. Strategic improvements in security headers and incident response transparency would further strengthen their posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
100/ 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

4 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

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

Keep watching christoph-heide.de

This scan found 24 issues across 5 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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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
62
Security headers
15
Email security
70
DNS health
60
Network security
40
GDPR outside view
100
Average
58

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

Christoph Heide occupies a solid position in the regional energy and building services market, leveraging a long history since 1927. Their business model focuses on service provision and installation in heating, sanitation, ventilation, and electrical sectors. The company targets homeowners and businesses requiring modern energy solutions like heat pumps and photovoltaics. Their partnership with Vaillant and offering of extended guarantees provide competitive advantages. The website's integration with job boards and online booking indicates a customer-centric approach and operational maturity. No parent or subsidiary companies were identified, suggesting an independent medium-sized enterprise with a focused local footprint.

Security posture

The website demonstrates a mature security posture with mandatory HTTPS and a GDPR-compliant cookie consent system that categorizes cookies and allows user control. Use of security-related plugins and web worker offloading indicates attention to performance and security. However, the absence of explicit security headers such as Content-Security-Policy and X-Frame-Options is a gap. No incident response contacts or vulnerability disclosure policies are published, which limits transparency. No vulnerabilities or exposed sensitive data were detected in the HTML content. Overall, the security maturity is good but can be improved by adding security headers and formalizing incident response information.

Recommendations

  1. Implement and enforce security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  2. Publish a clear security policy and incident response contact information on the website.
  3. Regularly audit and update WordPress core, themes, and plugins to mitigate vulnerabilities.
  4. Enhance accessibility features to meet higher compliance standards.
  5. Maintain transparency by providing terms of service and vulnerability disclosure information.

Contact details published on the site

Addresses
Legal name
CHRISTOPH Service für Haustechnik GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Christoph Heide
Description
Sanitär, Heizung, Lüftung und Elektro in Heide/Dithmarschen
Key services
Sanitär (bathroom renovation, water hygiene, leak protection), Heizung (heating systems, heat pumps, maintenance, emergency service), Lüftung (ventilation systems, air purification), Elektro (photovoltaics, electrical installations, lighting)
Content quality
good
Branding
consistent

Technology

Stack
WordPress 6.8.3, PHP, jQuery 3.7.1, Slider Revolution 6.7.38, FontAwesome 5.15.1, Pannellum (360 panorama viewer), CookieYes consent management, Google Site Kit, Web Worker Offloading, Multi Step Form Plus plugin
Frameworks
WordPress
Platforms
WordPress CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with granular controls
  • No exposed sensitive data in HTML
  • Use of security plugins (e.g. web-worker-offloading)

Analytics and tracking

Services
Google Analytics, YouTube
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
YouTube tracking cookies
Marketing tools
Google Site Kit, CookieYes
Transparency
good

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 implemented with detailed categories and user controls.
  3. Business information is clearly presented with multiple contact methods and team member photos.
  4. Use of modern WordPress plugins and technologies indicates active maintenance.
  5. No explicit terms of service page found.
  6. Security headers could be improved for enhanced protection.
  7. No explicit security or incident response policies published.
  8. Website targets local German market in energy/building services sector.
  9. No suspicious or malicious content detected.
Technical notes

Notes

The website is built on a modern WordPress platform with a well-maintained tech stack including jQuery, Slider Revolution, and FontAwesome. It uses advanced features like web worker offloading to improve performance. Hosting appears to be on Microsoft Azure, supported by load balancing cookies. The site is mobile-optimized and SEO-friendly with proper meta tags and structured data (JSON-LD). Cookie consent is managed by CookieYes, ensuring GDPR compliance. Performance is moderate, with room for improvement in loading speed and accessibility. No deprecated or vulnerable libraries were detected in the provided HTML content.
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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