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Security report for zgrebski.de

Zgrebski GmbH · Energy · Germany

Low risk. 1 critical or high finding in SSL/TLS.

Security score

77/100

Risk levelLow

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

Zgrebski GmbH is a small German company specializing in heating, bathroom design, ventilation, and water technology services, primarily serving the Schillingen region. The website reflects a local service provider with a clear focus on home and building technology solutions. The company positions itself as a competent and reliable partner for all aspects of home technology installations and renovations. The website content is relevant and professionally presented, targeting homeowners and businesses in need of these services. Technically, the website is built on the Multiscreensite CMS platform, utilizing modern web technologies such as service workers for offline support and Cookiebot for GDPR-compliant cookie management. The site is hosted on rzone.de servers and employs HTTPS with a good SSL configuration. Performance and mobile optimization are adequate, providing a good user experience across devices. SEO and accessibility features are present but could be enhanced further. From a security perspective, the site enforces HTTPS and includes cookie consent mechanisms, but lacks advanced security headers and a published security policy. No critical vulnerabilities or exposed sensitive data were detected. The WHOIS data is limited but consistent with the hosting provider, with no suspicious patterns identified. Privacy compliance is well addressed through detailed cookie policies and consent management. Overall, the website demonstrates a solid digital presence for a small local business with good privacy practices and a moderate security posture. Strategic improvements in security headers, incident response transparency, and contact information disclosure would enhance trust and compliance further.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 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

1 finding rated critical or high. Fix these first.

  1. 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 zgrebski.de

This scan found 21 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
65
DNS health
70
Network security
100
GDPR outside view
83
Average
77

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

Zgrebski GmbH operates in the energy sector, focusing on heating and sanitary installations. The business model is service-oriented, targeting local residential and commercial customers. The company leverages a straightforward website to showcase its services and build trust. The presence of Google site verification and structured data indicates attention to SEO and digital marketing. The use of Cookiebot and Usercentrics reflects compliance with European data protection regulations. No partnerships or subsidiaries are evident from the website. The company appears to maintain a consistent brand image and targets a niche market within Germany, likely relying on local reputation and direct customer engagement.

Security posture

The website's security posture is moderate. HTTPS is enforced, and cookie consent is properly managed, indicating awareness of privacy regulations. However, the absence of key security headers such as Content-Security-Policy and X-Frame-Options reduces protection against common web attacks. No incident response or security policy information is published, which limits transparency and preparedness. Third-party scripts are used but appear limited to consent management and fonts, minimizing attack surface. No vulnerabilities or exposed sensitive data were found in the analyzed content. Overall, the site meets basic security standards but would benefit from enhanced security controls and documented policies.

Recommendations

  1. Implement security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to strengthen defense against web attacks.
  2. Publish a dedicated security policy page outlining security practices and incident response procedures.
  3. Provide explicit contact information for security incidents, such as a security@ or abuse@ email address.
  4. Regularly review and update third-party scripts to avoid vulnerabilities.
  5. Enhance accessibility features and SEO metadata to improve user experience and search engine ranking.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Zgrebski GmbH
Description
Ihr kompetenter Ansprechpartner für alles rund um die Haustechnik: Zgrebski GmbH in Schillingen. Bad, Heizung, Lüftung, Wasser und mehr.
Key services
heating installation, bathroom design, ventilation systems, water technology
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Cookiebot, Service Worker, FontAwesome, Muli font, Droid Sans font, Roboto font
Platforms
Multiscreensite CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Service worker registered
  • Cookie consent banner implemented

Analytics and tracking

Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Cookiebot, Usercentrics, Meinungs Meister
Marketing tools
Cookiebot, Usercentrics
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. Cookie consent is implemented with detailed cookie categories and third-party providers.
  3. No explicit contact emails or physical addresses found in the provided HTML snippet; phone numbers or contact forms implied but not explicitly extracted.
  4. No terms of service or security policy pages detected.
  5. Use of modern web technologies including service workers and cookie management.
  6. No suspicious or malicious content detected.
  7. Website targets local customers in Germany for heating and sanitary services.
Technical notes

Notes

The website uses a modern tech stack with JavaScript, service workers, and cookie consent frameworks like Cookiebot and Usercentrics. It is hosted on rzone.de with nameservers docks19.rzone.de and shades18.rzone.de. Fonts used include Muli, Droid Sans, and Roboto, with FontAwesome icons. The site is built on the Multiscreensite CMS platform, which provides a structured and responsive layout. Performance is moderate with good mobile optimization. SEO is supported by canonical links, meta tags, and structured data in JSON-LD format. The site lacks advanced frameworks but is technically sound for a small business website.
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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