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Security report for tettaupartners.de

von Tettau | Rechtsanwälte | PartG mbB · Energy · Germany

High risk. 9 critical or high findings in GDPR outside view, Network security and 2 other checks.

Security score

49/100

Risk levelHigh

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

von Tettau | Rechtsanwälte | PartG mbB is a specialized German law firm focusing on renewable energy legal services, particularly in wind energy and photovoltaics. With over two decades of experience, the firm serves a nationwide clientele including project developers, operators, manufacturers, financiers, and investors. Their market position is that of a leading medium-sized law firm in the renewable energy sector in Germany, offering comprehensive legal expertise in planning, environmental, energy, and transactional law. The website reflects a professional and consistent brand image with detailed service descriptions and transparent contact information. Technically, the website is built on the Contao Open Source CMS platform, utilizing modern JavaScript libraries such as jQuery and rocksolid-slider for interactive elements. The hosting is provided by kasserver.com, and the site is optimized for mobile devices with good accessibility and SEO practices. Performance is moderate, with no significant technical debt or vulnerabilities detected in the frontend code. From a security perspective, the site enforces HTTPS and implements a cookie consent mechanism limited to necessary cookies, indicating good privacy compliance. However, there is no explicit security policy or incident response contact information published, and security headers are not visibly configured, representing areas for improvement. No vulnerabilities or exposed sensitive data were found in the analysis. Overall, the website is trustworthy, professional, and compliant with GDPR requirements. The risk profile is low, with recommendations focusing on enhancing security headers, publishing a security policy, and adding a vulnerability disclosure mechanism to further strengthen the security posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
43/ 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

9 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. Network security

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

    • Critical

      Critical Service Exposed: SMB

      Port 445 (SMB) is publicly accessible - SMB - Windows file sharing, high risk

      What to do: Immediately restrict access to SMB using firewall or VPN

      • 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
    • Critical

      Critical Service Exposed: MySQL

      Port 3306 (MySQL) is publicly accessible - MySQL - Database server

      What to do: Immediately restrict access to MySQL using firewall or VPN

      • 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

  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 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';…

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  • TLS certificates and expiry
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  • 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
65
Email security
65
DNS health
70
Network security
0
GDPR outside view
43
Average
53
After the cap
49

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 · found on this site
  • 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 firm operates in the niche legal services market for renewable energy in Germany, a sector with growing demand due to the energy transition. Their competitive advantage lies in specialized expertise and longstanding client relationships. The business model is service-based, targeting project developers, operators, and investors in renewable energy. Revenue streams likely include legal consulting, contract drafting, and transactional support. The firm maintains a partnership ecosystem with industry bodies such as BWE and participates in seminars and webinars, indicating active market engagement and thought leadership. Growth indicators include a comprehensive team and active news/events sections. The firm’s operations are focused on Germany, with no indication of subsidiaries or parent companies.

Security posture

The security maturity level is moderate to good. HTTPS is enforced, and cookie consent is implemented with only essential cookies used, reflecting GDPR compliance. No security.txt or incident response contacts are published, which limits transparency for vulnerability reporting. Security headers are not detected, which could expose the site to certain web-based attacks. No vulnerable libraries or exposed sensitive data were found. The absence of analytics and tracking scripts reduces privacy risks. Overall, the security culture appears privacy-conscious but could benefit from formalized security policies and enhanced HTTP security headers.

Recommendations

  1. Implement HTTP security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  2. Publish a clear security policy and incident response contact information to improve transparency and trust.
  3. Add a security.txt file to facilitate responsible vulnerability disclosure.
  4. Regularly audit and update third-party libraries to ensure no vulnerabilities are introduced.
  5. Enhance website performance optimization to improve loading speed and user experience.

Contact details published on the site

Addresses
Legal name
von Tettau | Rechtsanwälte | PartG mbB
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
von Tettau | Rechtsanwälte | PartG mbB
Description
A specialized law firm focusing on renewable energies, particularly wind energy and photovoltaics, with over two decades of experience. They serve project developers, operators, manufacturers, financiers, and investors nationwide.
Key services
Bauplanungs- und Raumordnungsrecht, Genehmigungsrecht, Umweltrecht, Energierecht, Nutzungsvertragsrecht und Recht der dinglichen Sicherungen, Projektverträge, Transaktionen und gesellschaftsrechtliche Strukturierung
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery, rocksolid-slider, modernizr, Contao Open Source CMS, jQuery UI, colorbox, tablesorter
Frameworks
Contao CMS
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

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

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Marketing tools
marketingsuite (CSS bundle detected)
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is professionally presented in German, targeting renewable energy legal services.
  3. Comprehensive navigation and service descriptions enhance user experience.
  4. Cookie consent is implemented with only necessary cookies used.
  5. No social media links detected in the provided HTML content.
  6. Contact information is clearly provided including email, phone, and physical address.
  7. No explicit security policy or incident response information published.
  8. No analytics or tracking scripts detected, indicating privacy-conscious design.
  9. Technical stack is modern and based on Contao CMS with common JS libraries.
  10. No advertising or affiliate marketing detected.
Technical notes

Notes

The website uses Contao CMS, a robust open-source content management system, combined with modern JavaScript libraries including jQuery, rocksolid-slider, and colorbox for UI components. The site is mobile-optimized and accessible with semantic HTML and ARIA roles. SEO is supported by proper meta tags and structured data in JSON-LD format. Hosting is via kasserver.com, a known German hosting provider. Performance is moderate, with potential for improvement in loading times. No deprecated or vulnerable libraries were detected. The technical stack is well-suited for a professional law firm website, with opportunities to enhance security headers and optimize resource loading.
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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