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Security report for cssf.lu

Commission de Surveillance du Secteur Financier · Finance · Luxembourg

Low risk. 1 critical or high finding in SSL/TLS.

Security score

85/100

Risk levelLow

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

The Commission de Surveillance du Secteur Financier (CSSF) is a public institution responsible for supervising professionals and products within the Luxembourg financial sector. It serves both professionals and consumers by providing regulatory frameworks, publications, and guidance. The CSSF holds a key market position as Luxembourg's financial regulatory authority, offering services such as supervision of financial entities and dissemination of financial data. The website targets financial sector stakeholders and consumers seeking authoritative information and regulatory updates. Technically, the website is built on WordPress, utilizing modern web technologies including jQuery and Font Awesome, and integrates Matomo for analytics. The site demonstrates good digital maturity with responsive design, accessibility features, and a cookie consent mechanism compliant with GDPR. Performance is moderate with room for optimization. From a security perspective, the site enforces HTTPS and employs cookie-based security measures. However, explicit HTTP security headers are not detected, and no public security or incident response policies are found. No vulnerabilities or exposed sensitive data are evident. The absence of WHOIS data limits domain trust verification, but the official nature and content quality support legitimacy. Overall, the CSSF website is a professional, secure, and compliant platform serving as a trusted source for financial regulation in Luxembourg. Strategic recommendations include enhancing HTTP security headers, publishing security policies, and improving WHOIS transparency to strengthen trust and security posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
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

1 finding rated critical or high. Fix these first.

  1. 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

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

Keep watching cssf.lu

This scan found 16 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

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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
77
Security headers
80
Email security
85
DNS health
85
Network security
100
GDPR outside view
83
Average
85

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

CSSF operates as a government regulatory body in the finance sector, focusing on supervision and regulation of financial professionals and products in Luxembourg. Its business model is regulatory and public service oriented, with revenue likely derived from government funding and fees related to supervision. The target customers are financial professionals, institutions, and consumers within Luxembourg and possibly the EU. The website reflects a mature organization with consistent branding and a clear market position. Partnerships or subsidiaries are not evident from the website. The presence of career and whistleblowing pages indicates organizational transparency and governance. The CSSF maintains a digital presence with social media on LinkedIn and Vimeo, enhancing outreach. The use of Matomo analytics suggests a preference for privacy-conscious data collection. The website content is regularly updated with news, circulars, and FAQs, indicating active engagement with stakeholders.

Security posture

The CSSF website demonstrates a solid security posture with mandatory HTTPS usage and cookie consent mechanisms aligned with GDPR. Security cookies and anti-automation measures are in place. However, the absence of explicit HTTP security headers such as Content Security Policy (CSP), X-Frame-Options, and HSTS is a gap that could be addressed to enhance protection against common web attacks. No direct contact information for incident response or vulnerability disclosure is found, which could limit rapid communication in case of security incidents. The site does not expose sensitive data or use vulnerable libraries based on the analysis. The use of Matomo analytics is privacy-friendly but requires ongoing monitoring for security. Overall, the security maturity is good but could be improved by publishing security policies, adding security headers, and providing clear incident response contacts.

Recommendations

  1. Implement comprehensive HTTP security headers including CSP, HSTS, X-Frame-Options, and X-Content-Type-Options.
  2. Publish a dedicated security policy and vulnerability disclosure page to enhance transparency and incident response readiness.
  3. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.
  4. Enhance visibility of incident response contact channels such as security@ or abuse@ email addresses.
  5. Improve WHOIS data availability or transparency to strengthen domain trust and legitimacy.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Commission de Surveillance du Secteur Financier
Description
The Commission de Surveillance du Secteur Financier (CSSF) is a public institution which supervises the professionals and products of the Luxembourg financial sector.
Key services
Supervision of financial professionals, Regulation of financial products, Publication of regulatory framework and data, Providing information and guidance to professionals and consumers
Content quality
good
Branding
consistent

Technology

Stack
WordPress, jQuery, Font Awesome 6, Matomo Analytics
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • Use of security cookies to prevent automated attacks

Analytics and tracking

Services
Matomo
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Matomo
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content
  2. No WAF or blocking detected
  3. Uses WordPress CMS with modern frontend technologies
  4. Strong focus on financial regulation and supervision
  5. Good privacy and cookie consent implementation
  6. No direct contact emails or phone numbers found in HTML; contact via contact page
  7. WHOIS data unavailable, limiting domain trust analysis
Technical notes

Notes

The website is built on WordPress CMS with jQuery and Font Awesome for UI components, and Matomo for analytics. It uses modern web fonts and responsive design techniques ensuring good mobile optimization and accessibility. The site loads external resources from trusted domains under the cssf.lu domain and official social media platforms. Performance is moderate with some loading spinners visible, indicating asynchronous content loading. No major technical debt or outdated technologies are detected. The site uses cookie consent scripts and preloads fonts for performance. Hosting provider details are not explicitly found. The site could benefit from enhanced caching and security header implementation to improve performance and security further.
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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