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Security report for greix.de

German Real Estate Index (GREIX) · Real Estate · Germany

High risk. 8 critical or high findings in GDPR outside view, Email security and 2 other checks.

Security score

46/100

Risk levelHigh

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

GREIX is a German publicly funded research project providing comprehensive real estate price indices based on notarized sales data from local Gutachterausschüsse. It offers free access to scientifically processed data and visualizations for German cities and districts, targeting researchers, policymakers, and real estate professionals. The project is backed by reputable institutions such as the Kiel Institute for the World Economy and the ECONtribute cluster, with funding from the European Research Council. Technically, the website is modern, built with React, hosted on AWS, and uses privacy-conscious Matomo analytics. Security posture is strong with HTTPS, security headers, and cookie consent mechanisms, though explicit security policies and incident response contacts are not published. Overall, the website is professional, trustworthy, and well-optimized for performance and accessibility.

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

8 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

  2. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  3. 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';…

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

Keep watching greix.de

This scan found 29 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
60
DNS health
60
Network security
40
GDPR outside view
28
Average
46

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

GREIX occupies a unique niche as a provider of long-term, regional real estate price indices in Germany, leveraging official notarized transaction data. Its business model is non-commercial, focusing on transparency and research dissemination. The project benefits from strong academic partnerships and public funding, enhancing credibility and data quality. Its target audience includes academic researchers, government agencies, real estate market analysts, and the general public interested in housing market trends. The partnership ecosystem includes the Kiel Institute, universities of Bonn and Cologne, and local Gutachterausschüsse. The project shows growth potential by expanding data coverage to more cities and offering new indices such as the Mietpreisindex.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, comprehensive security headers, and no visible vulnerabilities or exposed sensitive data. The use of Matomo analytics aligns with privacy best practices. However, the absence of a published security policy, vulnerability disclosure program, or incident response contact limits transparency and preparedness. No data protection officer contact is provided, which may be a minor compliance gap. Overall, the security measures are appropriate for the site's informational nature but could be enhanced by formalizing security governance documentation and incident handling procedures.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide clear incident response contact information for security issues.
  4. Add data protection officer contact details to improve GDPR transparency.
  5. Continue expanding data coverage and maintain regular security and privacy audits.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
German Real Estate Index (GREIX)
Description
GREIX provides real estate price development indices in Germany based on notarized sales prices collected from local Gutachterausschüsse. It offers free access to high-quality, scientifically processed data for German cities and districts, updated quarterly.
Key services
Real estate price indices, Data visualization, Data downloads, Mietpreisindex (rental price index)
Content quality
excellent
Branding
consistent

Technology

Stack
React, JavaScript, Leaflet.js, Matomo Analytics
Frameworks
React
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

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

Analytics and tracking

Services
Matomo
Tracking level
minimal
Privacy practices
good

Advertising

Tracking pixels
Matomo
Transparency
basic

Site quality

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

Key observations

  1. Website is a publicly funded research project providing free real estate price indices for Germany.
  2. Content is comprehensive, well-structured, and professionally presented in German with English options.
  3. No direct contact emails or phone numbers found; contact is via web form.
  4. Strong scientific and institutional backing from IfW Kiel, ECONtribute, and ERC funding.
  5. No terms of service page detected.
  6. Cookie consent banner present and functional.
  7. No explicit security or incident response policies published.
  8. No vulnerability disclosure or security.txt found.
  9. Use of Matomo analytics indicates privacy-conscious tracking.
  10. No advertising or affiliate marketing detected.
Technical notes

Notes

The website uses a modern React-based frontend with Leaflet.js for map visualizations and Matomo for analytics, hosted on AWS infrastructure. Performance is fast with optimized assets and mobile responsiveness. The site uses standard security headers and enforces HTTPS. No CMS detected, indicating a custom-built solution. The technical stack is well-suited for data visualization and public research dissemination. Opportunities exist to enhance SEO with additional metadata and to formalize accessibility features further. No technical debt or legacy technology detected.
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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