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Security report for jsns.cz

JSNŠ · Education · Czech Republic

Medium risk. 4 critical or high findings in SSL/TLS and Security headers.

Security score

63/100

Risk levelMedium

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

The website www.jsns.cz represents an educational initiative named Jeden svět na školách (JSNS), focused on providing free and legal documentary film screenings for schools in the Czech Republic. The platform supports educators by offering activities and projects to enrich teaching. The site targets schools and educators, positioning itself as a niche non-profit educational content provider. Technically, the website employs modern web technologies including Google Tag Manager, Cookiebot for consent management, Leaflet.js for mapping, and standard web libraries such as Font Awesome and Select2. The site is mobile optimized and demonstrates good SEO and accessibility basics. Security-wise, HTTPS is enforced with appropriate security headers, and no vulnerabilities or exposed sensitive data were detected. Cookie consent mechanisms are implemented, indicating GDPR awareness, although no explicit privacy policy or terms of service pages were found in the provided content. WHOIS data is unavailable, which reduces transparency and trustworthiness from a domain registration perspective. Overall, the website is professionally designed, secure, and serves a clear educational purpose, but would benefit from enhanced privacy disclosures and contact information to improve compliance and trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
100/ 100 · Low
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

4 findings rated critical or high. Fix these first.

  1. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  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 jsns.cz

This scan found 17 issues across 5 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

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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
0
Security headers
20
Email security
75
DNS health
80
Network security
100
GDPR outside view
100
Average
63

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

JSNS operates in the education sector, providing documentary films and educational resources to schools. The business model is non-profit and focused on enriching school curricula through legal film screenings and related activities. The target audience is primarily educators and schools in the Czech Republic. The website integrates with partner organizations such as People in Need and Clovek v Tisni, indicating a collaborative ecosystem. The platform leverages digital marketing and analytics tools to monitor engagement and optimize outreach. Growth indicators include active cookie consent management and integration with multiple external service providers. The lack of explicit business contact details and WHOIS transparency suggests a small-scale operation focused on content delivery rather than commercial expansion.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, presence of key security headers (HSTS, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Content-Security-Policy), and no visible security vulnerabilities in the HTML content. Cookie consent is managed via Cookiebot, supporting GDPR compliance. However, the absence of a detailed privacy policy and incident response contact information represents a compliance gap. No evidence of security.txt or vulnerability disclosure programs was found. The site does not expose sensitive data or use vulnerable libraries. Overall, the security posture is strong for a small educational site but could be improved by adding formal privacy and incident response documentation.

Recommendations

  1. Publish a comprehensive privacy policy page detailing GDPR compliance and data processing practices.
  2. Provide clear contact information for data protection officer or security incident reporting.
  3. Enhance website accessibility features to meet higher standards.
  4. Implement a vulnerability disclosure policy or security.txt file to improve transparency.
  5. Regularly review and update third-party integrations and cookie usage to maintain compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
JSNŠ
Description
Jeden svět na školách (JSNS) - promítejte ve škole zdarma a legálně dokumentární filmy. Využívejte aktivity do hodin a zapojte se do projektů, které obohatí vaši výuku.
Key services
Free legal documentary film screenings in schools, Educational activities and projects
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Google Tag Manager, Cookiebot, Leaflet.js, Select2, Font Awesome
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

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

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Google Ads, Seznam.cz Ads
Tracking pixels
Cookiebot
Marketing tools
Cookiebot
Transparency
good

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 challenge.
  2. WHOIS data is unavailable, which is unusual and reduces transparency.
  3. Cookie consent is implemented with Cookiebot, indicating GDPR awareness.
  4. No explicit privacy policy or terms of service pages found in the provided content.
  5. No direct contact emails or phone numbers found in the HTML content.
  6. Website uses modern JavaScript libraries and Google Tag Manager for analytics.
  7. Content is focused on educational documentary films for schools in Czech Republic.
  8. No security vulnerabilities or exposed sensitive data detected in the HTML content.
Technical notes

Notes

The website uses a modern tech stack including HTML5, CSS3, JavaScript libraries such as Leaflet.js for interactive maps, Select2 for enhanced select boxes, and Font Awesome for icons. Google Tag Manager and Cookiebot are integrated for analytics and consent management. The site loads CSS and JS resources efficiently, with some use of cache-busting for static assets. Mobile optimization is good, and SEO meta tags are properly configured. No CMS was explicitly detected, suggesting a custom or static site architecture. Hosting provider details are not available from the content. Performance is moderate, with potential for optimization in asset delivery and accessibility improvements. Overall, the technical infrastructure supports the business goals effectively with room for modernization and enhanced accessibility.
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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