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Security report for chl.lu

Centre Hospitalier de Luxembourg · Healthcare · Luxembourg

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

63/100

Risk levelMedium

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

Centre Hospitalier de Luxembourg (CHL) is a prominent healthcare institution in Luxembourg offering a wide range of clinical services, medical education, and research. The website reflects a well-established organization with multiple specialized clinics and accreditations such as JCI. The digital infrastructure is modern, leveraging Drupal 10 CMS, Google Tag Manager, and Google Maps API, with a strong emphasis on privacy and cookie consent compliance. Security posture is robust with HTTPS, security headers, and no visible vulnerabilities. However, the WHOIS data is missing or malformed, which slightly impacts domain trustworthiness. Overall, the website is professional, user-friendly, and trustworthy, serving patients, medical professionals, and researchers effectively.

Scanned

NIS2 and GDPR posture

GDPR outside view
73/ 100 · Medium
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. 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 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';…

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • 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

  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

  4. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • High

      High-Risk Service Exposed: FTP

      Port 21 (FTP) is publicly accessible - FTP - Often unencrypted file transfer

      What to do: Consider restricting access to FTP or implementing strong authentication

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

Need hands-on remediation? Email guard@offseq.com

Keep watching chl.lu

This scan found 18 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.

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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
67
Security headers
65
Email security
70
DNS health
85
Network security
20
GDPR outside view
73
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

Technical appendix

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

Business context

Business profile

CHL holds a leading position in Luxembourg's healthcare sector, providing essential medical services and education. Its business model is public healthcare provision with a focus on patient care, research, and training. The website's content quality and branding consistency support its market position. Partnerships with specialized clinics and external medical centers enhance its ecosystem. The presence of detailed privacy policies and social media engagement indicates a mature digital strategy. The lack of WHOIS data is a minor concern but does not detract significantly from its credibility given the institutional nature.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, comprehensive security headers, and cookie consent mechanisms. No exposed sensitive data or vulnerable libraries were detected. The absence of a publicly available security policy or incident response contact is a gap that could be addressed to improve transparency and readiness. No vulnerability disclosure or security.txt file was found, which is recommended for institutional websites. Overall, the security measures align well with best practices for healthcare organizations.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and compliance.
  2. Provide clear incident response contact information or a dedicated page.
  3. Implement and publish a vulnerability disclosure policy or security.txt file.
  4. Investigate and resolve the WHOIS data issue to improve domain trustworthiness.
  5. Continue maintaining and updating privacy and cookie consent mechanisms to ensure ongoing GDPR compliance.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Centre Hospitalier de Luxembourg
Description
Centre Hospitalier de Luxembourg (CHL) is a major healthcare institution in Luxembourg providing clinical services, medical education, research, and patient care across multiple specialized clinics and centers.
Key services
Clinical services, Medical education, Research, Patient care, Specialized clinics (e.g., cardiology, maternity, pediatrics)
Content quality
excellent
Branding
consistent

Technology

Stack
Drupal 10, Google Tag Manager, Google Maps API, Optanon Cookie Consent
Frameworks
Drupal
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism
  • No exposed sensitive data in HTML
  • Secure forms with anti-bot measures

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and navigation.
  2. Uses Drupal CMS with modern web technologies.
  3. Strong privacy and cookie consent mechanisms implemented.
  4. Multiple contact points including emails, phones, and addresses.
  5. Social media presence on major platforms.
  6. No signs of adult or inappropriate content.
  7. WHOIS data is missing or malformed, limiting domain trust verification.
  8. Security headers and HTTPS are properly configured.
Technical notes

Notes

The website is built on Drupal 10, a modern and secure CMS platform, with integration of Google Tag Manager and Google Maps API for analytics and location services. The site is mobile optimized and accessible, with good SEO practices including meta tags and structured navigation. Performance is moderate, likely due to rich media content and external scripts. The technical stack is well maintained with no visible outdated or vulnerable components. Opportunities exist to enhance hosting transparency and further optimize performance.
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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