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Security report for lightbulb.lu

Lightbulb s.à r.l. · Technology · Luxembourg

High risk. 9 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

46/100

Risk levelHigh

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

Lightbulb s.à r.l. is a Luxembourg-based digital design and software development agency founded in 2013. The company specializes in custom software development, UX-focused design, and innovative software solutions tailored to client needs. Their market position is supported by a portfolio of notable clients and case studies, emphasizing a collaborative and quality-driven approach. The website reflects a professional and consistent brand image targeting businesses seeking bespoke digital solutions. Technically, the site is built on WordPress, employs modern CSS and JavaScript optimizations, and uses Matomo for privacy-conscious analytics. Hosting is managed via EuroDNS nameservers, consistent with the Luxembourg location. Security posture is good with HTTPS enforced and cookie consent implemented, though explicit security policies and headers are absent. Overall, the site is well-designed, mobile-optimized, and trustworthy, with clear contact information and active social media presence.

Scanned

This is an earlier scan of lightbulb.lu. View the latest report

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
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

9 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 Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

  2. 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 lightbulb.lu

This scan found 25 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
72
Security headers
15
Email security
70
DNS health
75
Network security
20
GDPR outside view
25
Average
46

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

The company operates in the technology sector, focusing on software development and UX design services. Their business model is service-oriented, delivering custom digital solutions to a diverse client base including government and private sector organizations. The presence of detailed case studies and client logos indicates a mature partnership ecosystem and a focus on quality delivery. Growth indicators include a well-maintained website with multilingual support and active social media channels. The company targets businesses requiring tailored software solutions, positioning itself as a trusted partner in digital transformation within Luxembourg and potentially broader markets.

Security posture

The website demonstrates a moderate to good security maturity level with HTTPS enabled and a cookie consent mechanism in place. However, there is no public security policy or incident response information, and no advanced security headers were detected. The absence of a vulnerability disclosure or security.txt file suggests limited transparency in security practices. No exposed sensitive data or vulnerable libraries were identified. The use of Matomo analytics indicates a privacy-conscious approach to user tracking. Overall, while basic security best practices are followed, there is room for improvement in formalizing security policies and enhancing header protections.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service to improve compliance and user trust.
  2. Implement and publicly disclose a security policy and incident response plan to enhance transparency.
  3. Add security headers such as Content-Security-Policy, X-Content-Type-Options, and Strict-Transport-Security to strengthen security posture.
  4. Consider publishing a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  5. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.

Contact details published on the site

Addresses
Legal name
Lightbulb s.à r.l.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Lightbulb s.à r.l.
Description
We transform complex problems into user-friendly software solutions by working closely with our clients to understand their needs
Key services
Custom Development, UX focused design, Innovative Solutions
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, JavaScript, CSS, Matomo Analytics
Platforms
Web
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data detected

Analytics and tracking

Services
Matomo
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Matomo
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges
  2. Content is professionally presented with clear business focus
  3. Cookie consent mechanism is implemented and functional
  4. No explicit privacy policy or terms of service pages found
  5. Contact information is clearly provided in footer
  6. Social media presence is active and linked
  7. Use of Matomo analytics indicates privacy-conscious tracking
  8. No security policy or incident response information publicly available
  9. No security headers detected in provided data
  10. Website uses WordPress CMS with optimized CSS and JS loading
Technical notes

Notes

The website is built on WordPress CMS with optimized CSS and JavaScript loading techniques to improve performance. It uses Matomo for analytics, reflecting a privacy-aware approach. Hosting is via EuroDNS nameservers, consistent with the Luxembourg business location. The site is mobile-optimized with responsive design and accessibility considerations. SEO is well addressed with proper meta tags, Open Graph, and JSON-LD structured data. Performance is moderate with room for improvement in caching and script loading. No critical technical debt or outdated technologies were detected, indicating a well-maintained technical infrastructure.
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

Earlier scans of this domain

  1. 46/100High33 findingsView report
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