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Security report for prefabsystems.be

Megaton/Structo Prefab Systems · Manufacturing · Belgium

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

68/100

Risk levelMedium

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

Megaton/Structo Prefab Systems is a well-established Belgian manufacturer specializing in prefabricated concrete elements, serving the construction industry across Belgium, the Netherlands, Luxembourg, and France. The company operates 11 production sites and offers a broad portfolio including prestressed floor elements, load-bearing concrete structures, and custom prefab solutions. Their in-house design and engineering team supports clients throughout the project lifecycle, positioning them as a comprehensive prefab systems provider. The website reflects a professional and consistent brand presence aligned with their parent company, Willy Naessens Group. Technically, the website employs modern web standards with HTML5, CSS3, and JavaScript, including external libraries such as Font Awesome and Plyr for media playback. The site is hosted via One.com and demonstrates moderate performance with good mobile optimization and basic accessibility features. SEO is basic but functional, with proper meta tags and language alternates. No major CMS or frameworks were detected, suggesting a custom or proprietary platform. From a security perspective, the site enforces HTTPS and implements a cookie consent mechanism compliant with GDPR. However, no explicit security headers or incident response policies are published, and no vulnerability disclosure or security contact information is available. No analytics or tracking scripts were detected, indicating a privacy-conscious approach. Overall, the security posture is solid but could be improved by adding security headers and formal policies. The overall risk assessment is low, with no blocking or WAF detected and no visible vulnerabilities. Strategic recommendations include enhancing security headers, publishing security and incident response policies, and expanding transparency around data protection. The website effectively supports the business goals and provides a trustworthy digital presence for its target audience.

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

7 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 Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

  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';…

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Keep watching prefabsystems.be

This scan found 22 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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  • 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
55
Email security
85
DNS health
70
Network security
100
GDPR outside view
28
Average
68

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

Megaton/Structo Prefab Systems holds a strong market position as a regional leader in prefabricated concrete manufacturing, supported by its parent company, Willy Naessens Group. Their business model integrates manufacturing with design services, targeting construction professionals and industrial clients. The company benefits from multiple production sites and a diversified product range, enabling scalability and customization. Their recruitment efforts via a dedicated job portal indicate growth and investment in human capital. The partnership ecosystem includes close ties with the parent company and related recruitment platforms. The website content and structure reflect a mature business with consistent branding and clear communication of services and contact points.

Security posture

The website demonstrates a moderate to good security maturity level, with mandatory HTTPS and a GDPR-compliant cookie consent mechanism. The absence of security headers and public security policies suggests room for improvement in defense-in-depth strategies. No exposed sensitive data or vulnerable libraries were detected, and no incident response or vulnerability disclosure mechanisms are published, which could limit rapid response to security events. The lack of analytics reduces privacy risks but also limits behavioral insights. Overall, the security posture is adequate for the business type but would benefit from formalized policies and enhanced technical controls.

Recommendations

  1. Implement comprehensive HTTP security headers including Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, and Strict-Transport-Security.
  2. Publish a dedicated security policy and incident response plan accessible on the website.
  3. Establish a vulnerability disclosure program or security.txt file to facilitate responsible reporting.
  4. Enhance accessibility features to meet higher standards and improve user experience for all visitors.
  5. Consider integrating privacy-friendly analytics to balance user insights with compliance.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Megaton/Structo Prefab Systems
Description
Megaton/Structo Prefab Systems is the commercial and overarching contact point for various prefabricated concrete elements produced in one of their 11 production entities. They supply prestressed floor elements (welfsels and TT floors), concrete load-bearing structures (beams and columns), load-bearing walls, and stairs (cages). They also offer project-specific custom solutions and have an in-house design and study department supporting clients throughout the prefab process. Active in Belgium, Netherlands, Luxembourg, and France.
Key services
Production and supply of prestressed concrete floor elements, Load-bearing concrete structures, Custom prefab concrete applications, In-house design and engineering support
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Font Awesome, Ion Icons, Plyr video player
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Cookie consent mechanism implemented

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is primarily in Dutch with language switchers for French and English.
  3. Cookie consent modal is implemented with detailed cookie categories.
  4. Contact information is clearly presented with phone and physical address.
  5. No explicit security or incident response policies published.
  6. No visible analytics or tracking scripts detected.
  7. Website uses multiple external scripts hosted on trusted CDNs.
  8. Social media presence limited to LinkedIn.
  9. No email addresses explicitly found in the HTML content.
Technical notes

Notes

The website is built on a custom or proprietary CMS platform with modern front-end technologies including HTML5, CSS3, and JavaScript. External libraries such as Font Awesome and Plyr are used for icons and media playback respectively. Hosting is provided by One.com, a reputable registrar and hosting provider. Performance is moderate with some optimization potential. Mobile responsiveness is good, and SEO basics are covered with meta tags and hreflang attributes for multilingual support. Accessibility is basic and could be improved. No major technical debt or outdated libraries were detected, indicating a well-maintained site.
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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