Rheinwerk Verlag GmbH · Education · Germany
Low risk. 2 critical or high findings in Security headers and SSL/TLS.
Rheinwerk Verlag GmbH operates as a leading specialized publisher in the German-speaking market, focusing on IT, design, and photography educational content. Their business model includes traditional book publishing, digital subscriptions (Rheinwerk 365), and educational events such as seminars and conferences. The website reflects a mature digital presence with professional design, clear navigation, and comprehensive content offerings targeting IT professionals, designers, photographers, and learners. The company maintains a strong market position with a focus on quality educational materials and digital transformation of their offerings. Technically, the website employs modern JavaScript libraries such as RequireJS and Knockout.js, integrates Google Tag Manager for analytics and marketing, and uses responsive design techniques ensuring excellent mobile optimization and accessibility. Hosting appears stable and self-managed with dedicated name servers. Performance is fast, and SEO practices are well implemented. From a security perspective, the site uses HTTPS with strong SSL configuration and implements a detailed cookie consent mechanism compliant with GDPR. Security headers are likely configured though not explicitly visible in HTML. No critical vulnerabilities or exposed sensitive data were detected. However, the site lacks a publicly visible security policy or incident response contact, which could be improved to enhance trust and readiness. Overall, Rheinwerk Verlag's website demonstrates a high level of professionalism, security awareness, and privacy compliance. The extensive use of third-party marketing and analytics tools is balanced with clear user consent and transparency. The domain registration data aligns well with the business identity, supporting legitimacy. Strategic recommendations include publishing a security policy, establishing a vulnerability disclosure channel, and enhancing direct contact options for security incidents.
Scanned
NIS2 Art. 21(2)
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.
2 findings rated critical or high. Fix these first.
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.
Controls resources the browser is allowed to load
What to do: Implement a Content-Security-Policy appropriate for your application
TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.
Server supports weak protocols: TLSv1.1
What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions
Need hands-on remediation? Email guard@offseq.com
This scan found 21 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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Each check with its score, findings and the evidence it collected.
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
Not counted
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.
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
Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.
Leaked records that mention rheinwerk-verlag.de, from OffSeq Breach.
2 subdomains affected
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Breach keeps ingesting new leaks, so these numbers can grow between scans.
Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.
Automated reading of the public site. Ratings are indicative.
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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