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Security report for duhovka-prace.cz

Duhovka Group, a.s. · Education · Czech Republic

Medium risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

55/100

Risk levelMedium

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

Duhovka Group, a.s. operates a bilingual Czech-English Montessori educational system in Prague, offering services from preschool through gymnasium and teacher training. The website focuses on career opportunities within the group and presents a professional, well-structured digital presence. The organization is medium-sized with over 500 children enrolled and multiple subsidiary institutions. Technically, the site uses modern web technologies including jQuery, Google Tag Manager, and a comprehensive cookie consent mechanism, indicating a mature digital infrastructure. Security posture is moderate with good privacy compliance but lacks explicit security policies or incident response contacts. WHOIS data is unavailable, which slightly reduces domain trustworthiness, but the website content and business information are consistent and professional. Overall, the site is safe, well-optimized, and trustworthy for its target audience.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 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

6 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

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, Google APIs

      What to do: Document all third-party data sharing in your privacy policy

  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 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 duhovka-prace.cz

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
35
Email security
70
DNS health
75
Network security
40
GDPR outside view
40
Average
55

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

Duhovka Group holds a strong market position in Prague's alternative bilingual Montessori education sector, leveraging a multi-institution model including preschool, elementary, gymnasium, and teacher training. Their business model focuses on education services and career development within their institutions. The company benefits from a consistent brand presence and a supportive community culture, as evidenced by employee testimonials and founder narratives. The group maintains partnerships and subsidiaries that reinforce its educational offerings. Growth indicators include a steady increase in student enrollment and expansion of educational levels. The website's integration with social media and analytics tools supports ongoing engagement and marketing efforts.

Security posture

The website demonstrates a moderate security maturity level with HTTPS usage and a robust cookie consent framework supporting GDPR compliance. However, the absence of visible security headers and explicit security or incident response policies indicates room for improvement. No vulnerabilities or exposed sensitive data were detected in the HTML content. The use of third-party scripts like Google Tag Manager and Analytics is standard but requires ongoing monitoring for security risks. The lack of a vulnerability disclosure or security.txt file suggests limited formal vulnerability management. Overall, the security posture is adequate for an educational institution but could be enhanced with additional policies and technical controls.

Recommendations

  1. Implement and verify HTTP security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options to enhance protection against common web attacks.
  2. Publish a clear security policy and incident response contact information on the website to improve transparency and readiness.
  3. Regularly audit and update third-party scripts and dependencies to mitigate potential vulnerabilities.
  4. Enhance accessibility features to improve compliance and user experience for all visitors.
  5. Consider registering and publishing a security.txt file to facilitate responsible vulnerability disclosure.

Contact details published on the site

Addresses
Legal name
Duhovka Group, a.s.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Duhovka Group, a.s.
Description
Česko-anglický montessori vzdělávací systém Duhovka vzdělává děti od jesličkového věku 2 let až po maturitu na gymnáziu. Postavený na bilingvním česko-anglickém prostředí a montessori metodě. Nabízí volná pracovní místa ve školství v Praze.
Key services
Montessori preschool and kindergarten, Elementary school, Gymnasium, Montessori teacher training institute, Career opportunities in education
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery, Google Tag Manager, Google Analytics, CookieConsent.js, Bootstrap (implied by navbar classes), Google Fonts (Barlow Semi Condensed)
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • Cookie consent with granular controls
  • No exposed sensitive data in HTML
  • Use of HTTPS implied by Google Tag Manager scripts loaded over HTTPS

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. Strong focus on Montessori bilingual education and career opportunities.
  3. Comprehensive cookie consent mechanism implemented with granular user controls.
  4. No explicit security policy or incident response contact information found.
  5. WHOIS data unavailable, limiting domain registration trust analysis.
  6. Multiple external domains linked are consistent with business group and partners.
  7. No suspicious or malicious content detected.
  8. Good SEO and mobile optimization observed.
Technical notes

Notes

The website employs a modern front-end stack with jQuery, Google Tag Manager, and Google Analytics for tracking and marketing. It uses Google Fonts for typography and Bootstrap-like responsive design elements for mobile optimization. The site loads asynchronously critical scripts and implements a detailed cookie consent mechanism with multiple categories, reflecting good privacy practices. Performance is moderate, with potential improvements in caching and resource optimization. No CMS or hosting provider information was detected. The site is well-structured with semantic HTML and meta tags supporting SEO. Technical debt appears low, but security header implementation and formal security documentation are lacking.
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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