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Security report for colas.cz

COLAS CZ, a.s. · Transportation · Czech Republic

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

Security score

56/100

Risk levelMedium

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

COLAS CZ, a.s. is a well-established Czech company specializing in road construction and infrastructure projects, including roads, bridges, railways, and tramways. It operates as part of the global Colas Group and has integrated several regional companies to strengthen its market position. The company offers a broad range of services from construction to supply of building materials and laboratory testing, targeting primarily business and public sector clients in the transportation infrastructure domain. The website is professionally designed, content-rich, and provides comprehensive contact information and service descriptions. Technically, the site uses modern JavaScript and Google Analytics with privacy-conscious settings, hosted likely by Active24 in the Czech Republic. Security posture is good with HTTPS enforced and cookie consent implemented, though some security headers are missing and no explicit security policy or incident response contacts are published. Overall, the site reflects a mature, credible business with a strong digital presence and compliance with GDPR requirements.

Scanned

This is an earlier scan of colas.cz. 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

    • 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

  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"

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

Keep watching colas.cz

This scan found 27 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
30
Email security
65
DNS health
45
Network security
100
GDPR outside view
25
Average
56

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

COLAS CZ holds a strong market position in the Czech transportation construction sector, leveraging its affiliation with the global Colas Group. Its business model focuses on B2B infrastructure projects and integrated supply of construction materials, supported by innovation and sustainability initiatives. The company targets government and private sector clients requiring road, rail, and bridge construction services. Growth is supported by acquisitions and integration of regional firms. The website's detailed project descriptions and news updates indicate active engagement and transparency. Social media presence on LinkedIn, Facebook, YouTube, and Instagram supports brand visibility. The company maintains multiple regional offices with clear contact channels, enhancing customer accessibility.

Security posture

The website demonstrates a solid security foundation with enforced HTTPS and a cookie consent mechanism that denies ad personalization by default, indicating privacy awareness. The contact form uses POST method and collects personal data securely. However, no explicit security policy or incident response information is published, which could be improved to enhance trust and readiness. The absence of security headers like Content-Security-Policy and X-Content-Type-Options is a minor gap. No vulnerabilities or exposed sensitive data were detected in the HTML content. Overall, the security posture is good but could benefit from formalized policies and enhanced HTTP headers.

Recommendations

  1. Publish a formal security policy page outlining security practices and frameworks.
  2. Add incident response contact information such as security@ or abuse@ email addresses.
  3. Implement and publish a vulnerability disclosure policy or security.txt file.
  4. Enhance HTTP security headers including Content-Security-Policy and X-Content-Type-Options.
  5. Improve accessibility features to meet higher standards for inclusive design.

Contact details published on the site

Addresses
Legal name
COLAS CZ, a.s.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
COLAS CZ, a.s.
Description
COLAS CZ is a Czech company specializing in road construction, including building, reconstruction, and repair of roads, bridges, rail and tram infrastructure, and supplying construction materials. It is part of the global Colas group and operates multiple subsidiaries and integrated companies.
Key services
Road construction, Rail and tram infrastructure, Bridge and monolithic structure construction, Construction materials supply, Laboratory testing services, Innovation in construction technologies
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Google Analytics (gtag.js)
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with opt-in/out
  • No exposed sensitive data in HTML
  • Secure contact form with POST method

Analytics and tracking

Services
Google Analytics
Tracking level
minimal
Privacy practices
good

Advertising

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 in Czech with English alternate links.
  3. Comprehensive contact information including multiple regional offices.
  4. Cookie consent banner is implemented with opt-in/out options.
  5. No explicit privacy or security policy pages beyond GDPR statement found.
  6. No terms of service page detected.
  7. Use of Google Analytics with denied ad personalization by default.
  8. No visible security headers in HTML but HTTPS is enforced.
  9. Contact form collects personal data including name, company, email, phone, and message.
  10. Social media presence on LinkedIn, Facebook, YouTube, Instagram.
Technical notes

Notes

The website uses a modern JavaScript-based front end with deferred script loading for performance optimization. Google Tag Manager and Google Analytics are integrated with privacy-conscious default settings. The site is hosted likely by Active24, a Czech hosting provider consistent with the domain registrar. The HTML is well-structured with proper meta tags for SEO and Open Graph tags for social sharing. Mobile optimization is good with responsive design elements. No CMS is detected, suggesting a custom or proprietary platform. Performance is moderate with room for improvement in accessibility and security headers. Overall, the technical infrastructure supports a professional and user-friendly experience.
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. 43/100High36 findingsView report
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