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Security report for structo.be

Structo · 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

Structo is a well-established Belgian manufacturer specializing in prefabricated prestressed and reinforced concrete elements, serving the industrial, utility, residential, and infrastructure construction sectors. As part of the Willy Naessens Group, Structo benefits from a strong market position and a reputation for quality and sustainability, supported by multiple certifications including BENOR, CE, KOMO, and CSC. The website reflects a professional and consistent brand image with clear business information and multilingual support. Technically, the website employs modern web standards with HTML5, CSS3, and JavaScript, including Google Tag Manager for analytics. The site is mobile-optimized and provides a cookie consent mechanism, indicating good privacy compliance. However, explicit security headers and a dedicated security policy or incident response contact are absent, representing areas for improvement. Security posture is solid with HTTPS enforced and no visible vulnerabilities or exposed sensitive data. The domain is long-standing and registered with a reputable registrar, consistent with the company's history, enhancing trustworthiness. Overall, the website demonstrates good content quality, technical implementation, and business credibility, with room to enhance security best practices and transparency. Strategic recommendations include implementing comprehensive security headers, publishing a security policy and incident response contacts, and conducting regular audits of third-party scripts to maintain a strong security posture and compliance.

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';…

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

Keep watching structo.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.

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
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

Structo operates in the manufacturing sector, focusing on prefabricated concrete elements for construction. Its competitive advantage lies in its long history since 1948, integration within the Willy Naessens Group, and strong certification portfolio. The business model centers on B2B sales to construction companies and infrastructure projects. The company targets industrial, utility, residential, and infrastructure markets, leveraging sustainability and quality as key differentiators. Partnership with related domains such as prefabsystems.be and willynaessenslovesyou.be supports recruitment and product promotion. Growth indicators include a large production capacity and ongoing ESG initiatives. The company maintains a professional online presence with clear contact points and certifications, supporting market trust and operational transparency.

Security posture

Structo's website security maturity is moderate to good. HTTPS is enforced, and no sensitive data is exposed in the HTML content. The presence of a cookie consent mechanism aligns with privacy regulations. However, the absence of explicit security headers such as Content Security Policy (CSP), HSTS, and X-Frame-Options reduces defense-in-depth. No dedicated security policy or incident response contact information is provided, which could hinder timely vulnerability reporting and response. No vulnerability disclosure or security.txt file is present, limiting transparency for security researchers. Overall, the security posture is adequate for a corporate site but could be improved by adopting additional security best practices and formalizing incident response channels.

Recommendations

  1. Implement HTTP security headers including CSP, HSTS, and X-Frame-Options to enhance protection against common web attacks.
  2. Publish a clear security policy and provide dedicated incident response contact channels (e.g., security@ or abuse@ email addresses).
  3. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
  4. Regularly audit and update third-party scripts and libraries to mitigate risks from vulnerable dependencies.
  5. Enhance privacy compliance transparency by detailing data retention policies and user rights related to analytics and tracking.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Structo
Description
Structo, gevestigd in Brugge, is gespecialiseerd in de productie van welfsels in voorgespannen beton, I-liggers met veranderlijke hoogte, I-liggers met constante hoogte, standaardliggers voor bruggen en kunstwerken, TTX-vloer elementen en gordingen in voorgespannen beton. Het bedrijf richt zich op industriebouw, utiliteitsbouw en woningbouw en heeft een sterke reputatie in voorgespannen brugliggers voor wegenis- en waterbouwkundige werken.
Key services
Productie van voorgespannen prefab betonelementen, Kanaalplaten (welfsels), Voorgespannen balken en kolommen, Brugliggers, TTX-vloerelementen, Gordingen
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Google Tag Manager, 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

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Transparency
basic

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 multilingual support
  3. Strong emphasis on sustainability and certifications
  4. Clear contact information and company background provided
  5. Cookie consent and privacy policy are implemented
  6. Use of Google Tag Manager for analytics and tracking
  7. No explicit security policy or incident response contact found
  8. No vulnerability disclosure or security.txt present
Technical notes

Notes

The website uses a modern tech stack with HTML5, CSS3, and JavaScript, including Google Tag Manager for analytics and Plyr for video playback. The site is mobile-optimized and includes a cookie consent modal, indicating attention to privacy compliance. Hosting appears to be with One.com A/S, a reputable provider. Performance is moderate with some external script dependencies. No CMS is explicitly detected, suggesting a custom or proprietary solution. Accessibility features are basic but present. SEO optimization is basic with meta tags and alternate hreflang links for multilingual support. Technical risks include lack of explicit security headers and potential reliance on multiple external scripts which should be monitored for vulnerabilities.
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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