Skip to main content

Security report for kalthoff-kollegen.de

Kalthoff & Kollegen · Finance · Germany

Medium risk. 6 critical or high findings in GDPR outside view and Security headers.

Security score

61/100

Risk levelMedium

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

Kalthoff & Kollegen is a well-established German professional services firm specializing in tax advisory, business consulting, and legal services. Operating in multiple cities, the company targets SMEs, medical professionals, entrepreneurs, and private individuals. The firm holds reputable certifications such as the DStV-Qualitätssiegel and Digital DATEV-Kanzlei, underscoring its commitment to quality and digital transformation. Their service portfolio is comprehensive, covering digital tax consulting, compliance, payroll, legal advice, and corporate consulting. The website reflects a mature digital presence with modern technologies and a professional design, supporting their market position as a trusted regional leader. Technically, the website is built on Joomla CMS with Bootstrap and jQuery frameworks, incorporating interactive elements like sliders and app promotion. The site is mobile-optimized and SEO-friendly but lacks explicit privacy and terms of service pages. Security-wise, HTTPS is used, and CSRF tokens are present, but security headers and incident response information are missing, indicating room for improvement in security posture. No WAF or blocking mechanisms were detected, and no vulnerabilities were apparent in the provided content. Overall, the website demonstrates a solid business and technical foundation with good trust indicators. However, enhancements in privacy compliance, security policies, and transparency would strengthen their security and compliance standing. The absence of direct contact emails and postal addresses on the main page suggests potential improvements in contact accessibility. Strategic recommendations include publishing comprehensive privacy and security policies, implementing security headers, and establishing a vulnerability disclosure process to enhance trust and compliance.

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

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 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 kalthoff-kollegen.de

This scan found 24 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.

Billed monthly to your card. Cancel anytime. See sample alerts.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

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
90
Security headers
20
Email security
70
DNS health
60
Network security
100
GDPR outside view
28
Average
61

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 kalthoff-kollegen.de, from OffSeq Breach.

No leaked records found

Breach holds no records for kalthoff-kollegen.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

Kalthoff & Kollegen holds a strong market position as a regional leader in tax, legal, and business consulting services in Germany. Their competitive advantage lies in their digital transformation focus, evidenced by certifications and app offerings. The business model revolves around professional advisory services targeting SMEs and specialized sectors like medical professions. Revenue streams likely include consulting fees, tax advisory, legal services, and digital service subscriptions. The company maintains an active partnership ecosystem, notably with DATEV, a key player in German tax software. Growth indicators include repeated awards and a comprehensive service portfolio. The firm's operations are supported by a professional website with integrated social media channels, enhancing client engagement and brand visibility.

Security posture

The current security maturity level of the website is moderate. The use of HTTPS and CSRF tokens indicates basic security hygiene. However, the absence of security headers such as Content Security Policy (CSP), X-Frame-Options, and HSTS reduces the overall security posture. No explicit security or incident response policies are published, and no vulnerability disclosure mechanisms are evident. The lack of these elements may expose the organization to risks such as clickjacking, cross-site scripting, and delayed incident handling. Data protection practices appear minimal on the website, with no visible privacy policy or data protection officer contact. Incident response readiness is unclear, and security culture indicators are limited to certifications and quality seals. Addressing these gaps would significantly improve the security posture and compliance with GDPR and NIS2 requirements.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service accessible from the website footer or main menu.
  2. Implement and configure essential security headers including CSP, HSTS, X-Frame-Options, and X-Content-Type-Options.
  3. Establish and publicize a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  4. Provide clear contact information including company email addresses and postal addresses to enhance transparency.
  5. Regularly update third-party libraries and CMS components to mitigate vulnerabilities and improve performance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Kalthoff & Kollegen
Description
Kalthoff & Kollegen are tax advisors, business consultants, and lawyers operating in multiple German cities including Dinslaken, Wesel, Bocholt, Düsseldorf, and Erkrath. They offer services in tax consulting, corporate consulting, and legal advice with a focus on digital transformation for SMEs.
Key services
Digitale Steuerberatung (Digital Tax Consulting), GoBD-Verfahrensdokumentation, Tax-Compliance, Laufende Steuerberatung (Ongoing Tax Consulting), Steuerrechtsdurchsetzung (Tax Law Enforcement), Steuergestaltung & Planung (Tax Planning), Lohnbuchhaltung (Payroll Accounting), Finanzbuchhaltung (Financial Accounting), Nachfolgeplanung (Succession Planning), Jahresabschlusserstellung (Annual Financial Statements)
Content quality
good
Branding
consistent

Technology

Stack
Joomla CMS, Bootstrap 5, jQuery 3.7.1, LayerSlider 6.6.077, TweenMax, MapLibre GL JS
Frameworks
Bootstrap
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • Use of HTTPS (implied by https URLs)
  • No visible exposed sensitive data in HTML
  • Use of CSRF token in scripts

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is professionally designed and content-rich for a tax and legal consulting firm.
  2. No explicit privacy or terms of service pages found in provided content.
  3. Cookie consent mechanism is implemented.
  4. Social media presence is strong and consistent with business branding.
  5. No security.txt or vulnerability disclosure found.
  6. WHOIS data supports domain legitimacy and consistency.
  7. No signs of WAF or content blocking.
  8. No exposed sensitive data or obvious security issues in HTML.
  9. Use of modern web technologies and CMS (Joomla).
Technical notes

Notes

The website is built on a Joomla CMS platform using Bootstrap 5 and jQuery 3.7.1, with additional libraries such as LayerSlider and TweenMax for animations and interactive content. The use of MapLibre GL JS suggests integration of map features. The site is responsive and optimized for mobile devices, with structured navigation and clear content categorization. Performance is moderate, with some heavy slider animations that may impact load times. The technical infrastructure appears stable but could benefit from modern security enhancements and performance optimizations. Hosting provider details are not disclosed in the HTML or WHOIS data. Overall, the technical stack supports the business needs but requires ongoing maintenance and security improvements.
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

Reviews of this site

Share your experience with kalthoff-kollegen.de. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review kalthoff-kollegen.de.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.