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Security report for nannen-carls.de

Nannen & Carls Steuerberatungsgesellschaft mbH · Finance · Germany

Medium risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

63/100

Risk levelMedium

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

Nannen & Carls Steuerberatungsgesellschaft mbH is a well-established tax consultancy firm based in Aurich, Germany, with a history dating back to 1982. The company offers a broad range of tax and business advisory services including digitalization, corporate succession, inheritance tax law, audits, restructuring, and business consulting. Their website reflects a professional and client-focused approach, emphasizing personalized service and employee development. The firm targets businesses and individuals seeking expert tax consultancy and economic advice, positioning itself as a trusted regional partner with modern digital capabilities. Technically, the website is built on the Webflow CMS platform, utilizing modern JavaScript libraries such as jQuery and Cookiebot for cookie consent management. The site is hosted on rzone.de servers and demonstrates good mobile optimization and SEO practices. Performance is moderate with a clean, well-structured design and clear navigation. Accessibility is basic but functional. From a security perspective, the site uses HTTPS with excellent SSL configuration and implements cookie consent mechanisms. However, it lacks explicit security policies, incident response contacts, and vulnerability disclosure information. No critical vulnerabilities or exposed sensitive data were detected. The WHOIS data aligns with the business claims, showing consistency and legitimacy. Overall, the website presents a trustworthy and professional image suitable for its business sector. Strategic improvements in security transparency and compliance documentation could further enhance trust and risk posture.

Scanned

This is an earlier scan of nannen-carls.de. View the latest report

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

6 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

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

  2. 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 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';…

  3. 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 nannen-carls.de

This scan found 25 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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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
57
Security headers
30
Email security
80
DNS health
70
Network security
100
GDPR outside view
43
Average
63

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention nannen-carls.de, from OffSeq Breach.

No leaked records found

Breach holds no records for nannen-carls.de right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Nannen & Carls operates in the finance sector as a tax consultancy firm with a medium-sized team of 23 employees. The company leverages its long-standing presence since 1982 to maintain a strong regional market position in Aurich, Germany. Their business model focuses on comprehensive tax advisory services, including digital transformation support and succession planning, catering primarily to local businesses and individuals. The firm emphasizes employee development and regional economic engagement, which supports sustainable growth and client retention. Their digital presence includes social media channels on LinkedIn, Facebook, and Instagram, enhancing brand visibility. The absence of parent or subsidiary companies suggests an independent operation. The website content and structure indicate a mature business with a clear value proposition and client-centric approach.

Security posture

The website demonstrates a solid security posture with mandatory HTTPS encryption and cookie consent management via Cookiebot, indicating GDPR awareness. No security headers were explicitly detected in the provided data, suggesting room for improvement in HTTP security header implementation (e.g., Content-Security-Policy, X-Frame-Options). There is no published security policy or incident response information, which limits transparency for security-conscious users. No vulnerability disclosure or security.txt file is present, reducing avenues for responsible vulnerability reporting. The absence of exposed sensitive data and use of modern libraries reduce immediate risks. Overall, the security maturity is moderate but could benefit from enhanced documentation and technical security headers.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and compliance.
  2. Add incident response contact information (e.g., security@ or abuse@ email addresses) to improve transparency.
  3. Implement and publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  4. Enhance HTTP security headers to include Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options.
  5. Improve accessibility features to meet higher standards and broaden user inclusivity.

Contact details published on the site

Addresses
Legal name
Nannen & Carls Steuerberatungsgesellschaft mbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Nannen & Carls Steuerberatungsgesellschaft mbH
Description
Nannen & Carls Steuerberatungsgesellschaft mbH is a tax consultancy firm based in Aurich, Germany, providing comprehensive tax and economic advisory services since 1982. They focus on personalized client service, employee development, and regional economic engagement.
Key services
Digitalisierung, Unternehmensnachfolge, Erbschaftssteuerrecht, Betriebsprüfungen, Umwandlung & Umstrukturierung, Unternehmensberatung
Content quality
good
Branding
consistent

Technology

Stack
jQuery 3.5.1, Cookiebot, Finsweet Attributes (numbercount, inputactive), SVG icons
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

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

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Tracking pixels
Cookiebot
Marketing tools
Cookiebot
Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed and well-structured.
  2. Clear contact information with phone, email, and physical address.
  3. Cookie consent implemented via Cookiebot.
  4. No terms of service page found.
  5. No explicit security or incident response policies published.
  6. No vulnerability disclosure or security.txt found.
  7. Social media presence on LinkedIn, Facebook, Instagram.
  8. Business focuses on tax consultancy and related advisory services.
  9. Website hosted on rzone.de with Webflow CMS.
  10. No signs of malicious or suspicious content.
Technical notes

Notes

The website is built using Webflow CMS, leveraging jQuery 3.5.1 and Cookiebot for cookie consent management. The use of SVG icons and Finsweet attributes indicates a modern front-end approach. Hosting is provided by rzone.de, a German hosting provider, consistent with the business location. The site is mobile optimized with responsive images and a clear navigation structure. Performance is moderate, with no critical technical debt observed. SEO is supported by proper meta tags including Open Graph and Twitter titles. The site lacks advanced frameworks or platforms but is well-suited for its business purpose. Opportunities exist to improve accessibility and security headers to enhance technical robustness.
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

Earlier scans of this domain

  1. 69/100Medium33 findingsView report
  2. 69/100 −1Medium33 findingsView report
  3. 70/100Medium32 findingsView report
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