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Security report for isn.cz

Jiří Blažek · Education · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

58/100

Risk levelMedium

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

The website www.isn.cz is a small-scale, niche project site operated by Jiří Blažek, focusing on two main projects: an electronic timing system for fire sport and an e-learning platform for volunteer firefighters in the Czech Republic. The business model appears to be community and project-driven, targeting volunteer fire brigades and fire sport enthusiasts with affordable and modular technical solutions and accessible online education. The site content is well-structured, informative, and uses modern web technologies such as Bootstrap and jQuery, with backend technologies including Java EE and Spring frameworks for the e-learning platform. However, the site lacks visible privacy, cookie, or terms of service policies and does not provide explicit contact information, which limits its compliance and business credibility. Security posture is moderate, with some use of Spring Security but no visible HTTPS or security headers information. WHOIS data is unavailable, likely due to privacy protection, which reduces trust verification. Overall, the site is functional and relevant for its audience but would benefit from improved security, compliance, and contact transparency.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 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

8 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 Policy found

      GDPR requires clear information about cookie usage

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

    • 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 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 isn.cz

This scan found 26 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
42
Security headers
45
Email security
65
DNS health
85
Network security
100
GDPR outside view
10
Average
58

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

The site serves a specialized market segment within the Czech Republic, focusing on volunteer firefighters and fire sport participants. Its competitive advantage lies in providing affordable, modular, and community-supported technical solutions and e-learning content tailored to this niche. The business model is project-based, likely non-commercial or low commercial scale, emphasizing open documentation and accessibility. The presence of social media links and GitHub suggests some level of community engagement and open-source collaboration. Growth potential depends on expanding user adoption within fire sport and volunteer firefighter communities. The lack of formal business information and contact details limits partnership and commercial opportunities.

Security posture

Security maturity is basic to moderate. The use of Spring Security in the e-learning platform is a positive indicator, but the absence of visible HTTPS enforcement, security headers, and published security policies is a concern. No incident response or vulnerability disclosure information is provided. The site does not appear to collect sensitive user data directly on the main page, reducing immediate risk, but the lack of privacy and cookie policies indicates compliance gaps, especially under GDPR. No known vulnerabilities or exposed sensitive data were detected in the provided content. Overall, security practices should be enhanced to improve trust and compliance.

Recommendations

  1. Implement HTTPS with a valid SSL certificate and enforce secure connections site-wide.
  2. Publish comprehensive privacy and cookie policies to comply with GDPR and inform users.
  3. Add clear contact information including emails and phone numbers for business and security inquiries.
  4. Introduce security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  5. Develop and publish an incident response plan and vulnerability disclosure policy to improve security posture and transparency.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Jiří Blažek
Description
The website presents projects focused on electronic timing systems for fire sport and an e-learning platform for volunteer firefighters in the Czech Republic. It aims to provide affordable, modular, and user-friendly solutions for smaller fire brigades and accessible online education for members of the fire association SH ČMS.
Key services
Electronic timing system for fire sport, E-learning platform for volunteer firefighters
Content quality
good
Branding
moderate

Technology

Stack
Bootstrap, jQuery, Font Awesome, Java EE, Spring MVC, Spring Security, Hibernate ORM, PostgreSQL
Frameworks
Bootstrap, Spring MVC, Spring Security
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
40/100
Good practices seen
  • Use of Spring Security in e-learning project

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is accessible with full content and no blocking detected.
  2. No privacy, cookie, or terms of service policies found on the site.
  3. No contact emails or phone numbers explicitly provided.
  4. Social media links present to Google+, LinkedIn, GitHub, and internal wiki and webmail.
  5. Website uses standard open source libraries and frameworks.
  6. No security headers or HTTPS status information available from provided data.
  7. WHOIS data is unavailable, indicating privacy protection or domain registration issues.
  8. Content is niche, educational, and technical with no advertising or tracking detected.
Technical notes

Notes

The website uses a classic Bootstrap-based responsive design with jQuery and Font Awesome for UI elements. The e-learning platform backend is built on Java EE with Spring MVC, Spring Security, Hibernate ORM, and PostgreSQL, indicating a robust enterprise-grade technology stack. Performance is likely moderate given the use of standard libraries and no heavy scripts detected. Mobile optimization is good due to Bootstrap responsiveness. SEO is basic with minimal meta tags and no structured data like JSON-LD or Open Graph tags found. No CMS detected, suggesting a custom or static site approach. Hosting provider and SSL configuration details are not available from the data provided. Technical debt appears low but modernization opportunities include adding SEO enhancements, accessibility improvements, and security hardening.
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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