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Security report for holtzbrinckverlage.de

Holtzbrinck Buchverlage GmbH · Media · Germany

Medium risk. 4 critical or high findings in GDPR outside view and SSL/TLS.

Security score

69/100

Risk levelMedium

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

Holtzbrinck Buchverlage GmbH is a prominent German publishing group managing several well-known imprints including Rowohlt, S. Fischer, Argon, Kiepenheuer & Witsch, and Droemer Knaur. The website serves as a corporate portal presenting these subsidiaries and their publishing activities, targeting a general audience interested in literature and media. The business model centers on book publishing and author representation, positioning Holtzbrinck as a major player in the German media industry. Technically, the site employs modern JavaScript frameworks (Vue.js) and integrates consent management and analytics tools, reflecting a mature digital infrastructure. Security posture is solid with HTTPS and consent mechanisms, though some security headers and explicit policies are absent. Overall, the site is professional, trustworthy, and compliant with GDPR requirements, with no signs of blocking or malicious content.

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

4 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

    • 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

  2. 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

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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
72
Security headers
90
Email security
60
DNS health
65
Network security
100
GDPR outside view
28
Average
69

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 holtzbrinckverlage.de, from OffSeq Breach.

No leaked records found

Breach holds no records for holtzbrinckverlage.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

The company holds a strong market position in the German publishing sector with multiple subsidiary imprints, each with dedicated domains linked from the main site. The business model is focused on traditional and digital publishing services, leveraging brand recognition and author networks. The website supports marketing and corporate communications but does not expose direct contact emails or phone numbers, relying on contact forms. The presence of Usercentrics for consent management and Google Tag Manager for analytics indicates attention to privacy and data-driven marketing. No direct revenue streams or e-commerce functions are visible, consistent with a publishing group rather than a retailer. The ecosystem of partner and subsidiary domains is well integrated, supporting brand consistency and user navigation.

Security posture

The website demonstrates a good security baseline with enforced HTTPS and integration of a consent management platform respecting user privacy preferences. However, the absence of visible security headers such as Content-Security-Policy or X-Frame-Options suggests room for improvement. No explicit security policies or incident response contacts are published, which could hinder transparency and readiness in case of security incidents. No vulnerabilities or exposed sensitive data were detected in the provided content. The use of Google Tag Manager is configured to respect Do Not Track signals, enhancing privacy compliance. Overall, the security posture is adequate but could be strengthened by publishing formal policies and implementing additional HTTP security headers.

Recommendations

  1. Implement and verify HTTP security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Publish a dedicated security policy page and provide clear incident response contact information to improve transparency and readiness.
  3. Add a vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  4. Enhance accessibility features to improve compliance and user experience for all visitors.
  5. Regularly audit third-party scripts and libraries to ensure no vulnerable components are included.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Holtzbrinck Buchverlage GmbH
Description
Unsere Verlage Rowohlt, S. Fischer, Argon, Kiepenheuer & Witsch und die Verlagsgruppe Droemer Knaur erwecken die Werke von Autoren aus aller Welt zum Leben.
Key services
Book publishing, Author representation, Media content distribution
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Vue.js, Google Tag Manager, Usercentrics Consent Management
Frameworks
Vue.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Consent management via Usercentrics
  • Google Tag Manager with Do Not Track respect

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
Usercentrics Consent Management
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is professional and consistent with a major German publishing group.
  3. No explicit contact emails or phone numbers found in HTML; contact via form only.
  4. Privacy and cookie policies are present and GDPR compliant with consent mechanism.
  5. No explicit security policy or incident response info published.
  6. Modern JavaScript framework (Vue.js) used with consent management and analytics.
  7. No security headers detected in provided data; SSL is present and strong.
  8. Multiple external links to subsidiary and partner publishing domains.
  9. No suspicious or malicious content detected.
  10. No adult or NSFW content present.
Technical notes

Notes

The website is built using Vue.js, a modern JavaScript framework, indicating a contemporary front-end architecture. It uses Google Tag Manager for analytics and Usercentrics for GDPR-compliant consent management. The site loads multiple JavaScript and CSS assets asynchronously, suggesting performance optimization efforts. Mobile optimization is good, with responsive design evident. No explicit CMS was detected, implying a custom or proprietary content management solution. Hosting details are not disclosed, but DNS name servers indicate professional DNS hosting. Performance is moderate, with potential for further optimization. SEO is well addressed with proper meta tags and Open Graph data. Accessibility is basic and could be improved. Overall, the technical implementation is solid with room for enhancements in security and accessibility.
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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