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Security report for rainermuehlhoff.de

Rainer Mühlhoff · Education · Germany

Medium risk. 8 critical or high findings in GDPR outside view, Email security and 2 other checks.

Security score

54/100

Risk levelMedium

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

The website rainermuehlhoff.de is the professional academic site of Prof. Rainer Mühlhoff, a philosophy professor specializing in the ethics and social philosophy of digital society and artificial intelligence. The site serves as a platform for sharing research, publications, videos, and event information, targeting academics, students, and the interested public. It positions Prof. Mühlhoff as a thought leader in AI ethics with a strong university affiliation and media presence. Technically, the site is built using the Jekyll static site generator with the Minimal Mistakes theme, employing standard web technologies such as HTML5, CSS3, JavaScript, and jQuery. The site is moderately performant, mobile-optimized, and SEO-friendly, though accessibility features are basic. No advanced analytics or tracking technologies are detected, indicating a privacy-conscious approach. From a security perspective, the site uses HTTPS as indicated by canonical URLs, but no explicit security headers were detected in the provided data. There are no forms collecting sensitive data, and no vulnerabilities or exposed sensitive information were found. However, the absence of privacy and cookie policies represents a compliance gap, especially under GDPR requirements. Overall, the website is professional, content-rich, and trustworthy, but could improve in privacy compliance and security best practices. The domain registration data is minimal but consistent with the academic nature of the site, with no suspicious indicators or blocking mechanisms detected.

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

8 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

  2. 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.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  3. 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 rainermuehlhoff.de

This scan found 30 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

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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
62
Security headers
15
Email security
60
DNS health
60
Network security
100
GDPR outside view
28
Average
54

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 rainermuehlhoff.de, from OffSeq Breach.

No leaked records found

Breach holds no records for rainermuehlhoff.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 site reflects a small academic entity focused on research and education in AI ethics and digital society philosophy. Its market positioning is as a thought leader in this niche academic field, supported by university affiliations and media engagements. The business model is non-commercial, centered on knowledge dissemination through publications, lectures, and public talks. The target audience includes students, researchers, and the general public interested in AI and ethics. The site leverages a partner ecosystem including university institutes and research organizations but does not show commercial partnerships or subsidiaries. Growth indicators include recent publications and active event participation.

Security posture

The security maturity level is moderate. HTTPS is used, but no security headers were detected, which could improve protection against common web attacks. No forms or inputs collecting personal data reduce attack surface. There is no visible incident response or vulnerability disclosure information, which limits readiness for security events. GDPR compliance is incomplete due to missing privacy and cookie policies. No vulnerabilities or exposed sensitive data were found. The security culture appears basic but adequate for a static academic site. Recommendations include adding security headers, privacy policies, and incident response contacts.

Recommendations

  1. Implement comprehensive privacy and cookie policies to ensure GDPR compliance.
  2. Add security headers such as Content-Security-Policy, X-Frame-Options, and HSTS to enhance security posture.
  3. Establish and publish an incident response contact or security email for vulnerability reporting.
  4. Improve accessibility features to meet higher standards for inclusive design.
  5. Consider adding a vulnerability disclosure policy or security.txt file to foster transparency.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Rainer Mühlhoff
Description
Philosoph, Mathematiker, Programmierer. Research and teaching on societal impacts of artificial intelligence and digital media. Leads research group on Ethics and Critical Theories of AI at University of Osnabrück.
Key services
Research publications, Lectures and teaching, Public talks and media appearances, Video content on AI ethics
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, jQuery
Frameworks
Jekyll, Minimal Mistakes Jekyll Theme
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS usage implied by canonical URL
  • No visible exposed sensitive data
  • No forms detected that collect sensitive data

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is an academic personal site for Prof. Rainer Mühlhoff.
  2. Content is rich with publications, videos, and event information.
  3. No privacy or cookie policies found, which is a compliance gap.
  4. No forms detected that collect personal data.
  5. Social media presence on Mastodon, Bluesky, LinkedIn, YouTube.
  6. No advertising or tracking scripts detected.
  7. Uses Jekyll static site generator with Minimal Mistakes theme.
  8. No explicit security headers detected in provided data.
  9. WHOIS data is minimal but domain appears legitimate.
  10. No WAF or blocking mechanisms detected.
Technical notes

Notes

The website is built on a static site generator (Jekyll) with a well-known theme (Minimal Mistakes), ensuring maintainability and performance. The tech stack includes standard web technologies and jQuery for interactivity. The site is mobile-optimized and SEO-friendly with proper meta tags and structured data (JSON-LD). No advanced hosting or CMS platforms detected. Performance is moderate, likely due to static content delivery. No analytics or tracking scripts detected, indicating minimal data collection. Technical risks are low but could be improved by adding security headers and enhancing 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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