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Security report for meistro.de

meistro GmbH · Energy · Germany

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

65/100

Risk levelMedium

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

meistro GmbH is a German energy service provider specializing in comprehensive energy solutions for commercial clients. Their offerings include energy supply (electricity and gas), energy consulting, and energy generation through solar parks. Established since 2006, meistro serves over 12,000 commercial customers, positioning itself as a reliable and certified partner in the energy sector, with TÜV Nord certification and positive customer reviews. The company targets businesses in Germany seeking sustainable and efficient energy solutions. Technically, the website is built on TYPO3 CMS with Bootstrap and integrates modern tools such as Google Tag Manager and Google Analytics (GA4). The site is hosted on Schlundtech infrastructure and demonstrates good performance, mobile optimization, and accessibility. Cookie consent and GDPR compliance mechanisms are robustly implemented, reflecting a mature digital presence. From a security perspective, the site enforces HTTPS and employs cookie consent but lacks explicit security headers and a published security policy or incident response contacts. No vulnerabilities or exposed sensitive data were detected. The WHOIS data is structured but limited in registrant detail, consistent with a legitimate German business domain. Overall, meistro.de presents a professional, trustworthy, and well-maintained digital platform aligned with its business goals. Strategic improvements in security headers and transparency around security policies would enhance its security posture and trustworthiness further.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
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

6 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. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. 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.

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

Keep watching meistro.de

This scan found 26 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

€25per month

  • 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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Full report

€39.90one-time

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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
30
Email security
65
DNS health
65
Network security
100
GDPR outside view
68
Average
65

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

meistro GmbH operates in the energy sector, focusing on providing sustainable energy supply and consulting services to commercial customers in Germany. Their business model integrates energy procurement, direct marketing, energy contracting, and solar energy generation, creating a vertically integrated service offering. The company leverages certifications like TÜV Nord to build trust and differentiates itself through personalized service and a broad portfolio. Their digital ecosystem includes partnerships and tracking integrations with major platforms such as Google, LinkedIn, and Meta, supporting marketing and customer insights. The presence of an embedded tariff calculator iframe indicates a focus on user engagement and conversion. Growth indicators include a sizable customer base and active social media presence. The company’s operations appear stable and regionally focused, with opportunities for expansion in renewable energy projects.

Security posture

The website demonstrates a solid baseline security posture with HTTPS enforced and a comprehensive cookie consent mechanism supporting GDPR compliance. However, the absence of key security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security represents an area for improvement. No signs of exposed credentials, malware, or phishing were found. The use of multiple third-party tracking and marketing scripts introduces a moderate privacy risk, mitigated by user consent controls. The lack of a published security policy or incident response contact limits transparency and readiness for security incidents. Overall, the security maturity is moderate to good, suitable for the business type but with room for enhancement in defense-in-depth and incident management transparency.

Recommendations

  1. Implement comprehensive HTTP security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to strengthen browser security.
  2. Publish a clear security policy and provide dedicated incident response contact channels (e.g., security@ or abuse@ email addresses).
  3. Add a security.txt file to facilitate responsible vulnerability disclosure and improve transparency.
  4. Review and minimize third-party tracking scripts to reduce privacy risks and improve user trust.
  5. Regularly audit and update all third-party libraries and scripts to mitigate potential vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
meistro GmbH
Description
meistro ist ihr 360 Grad Dienstleister: Energieversorgung (Strom & Gas), Energieberatung und Energieerzeugung (Solarparks).
Key services
Energy supply (electricity and gas), Energy consulting, Energy generation (solar parks), Direct marketing, Energy contracting
Content quality
excellent
Branding
consistent

Technology

Stack
TYPO3 CMS, Bootstrap, Swiper Slider, Google Tag Manager, Google Analytics (GA4), LinkedIn tracking cookies, Meta (Facebook) tracking cookies, Leadinfo tracking, TVSquared tracking, Google Adsense
Frameworks
TYPO3 CMS, Bootstrap
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced (canonical URL is https)
  • Cookie consent mechanism implemented
  • No exposed sensitive data found in HTML

Analytics and tracking

Services
Google Analytics (GA4), Leadinfo, TVSquared
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google Adsense, Meta (Facebook Ads), LinkedIn Ads
Tracking pixels
Google Analytics (GA4), Leadinfo, TVSquared
Transparency
good

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 challenge.
  2. Strong cookie consent and privacy compliance mechanisms implemented.
  3. Business is focused on energy supply, consulting, and generation for commercial clients in Germany.
  4. Use of modern CMS TYPO3 and integration of multiple tracking and marketing tools.
  5. Good branding consistency and professional design.
  6. No visible security policy or incident response contact information.
  7. WHOIS data is available but limited in detail; domain uses Schlundtech hosting.
Technical notes

Notes

The website is built on TYPO3 CMS, a mature and widely used content management system, combined with Bootstrap for responsive design. It uses modern JavaScript libraries such as Swiper for sliders and integrates Google Tag Manager for analytics and marketing tag management. The site loads multiple compressed CSS and JS assets, indicating optimization efforts. Hosting is provided by Schlundtech, a reputable German hosting provider. Performance is moderate with good mobile optimization and accessibility features. The presence of structured data (JSON-LD) enhances SEO and semantic understanding. The embedded iframe for tariff calculation shows integration with external services, handled securely with origin checks. Overall, the technical infrastructure is solid, though opportunities exist to improve security headers and streamline third-party dependencies.
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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