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Security report for zushlinsko.cz

ZUŠ Hlinsko · Education · Czech Republic

Medium risk. 9 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

ZUŠ Hlinsko is a small educational institution specializing in music and visual arts education with a long tradition in the Czech Republic. The website serves as an information portal for students, parents, and the local community, providing news, event calendars, and contact details. The business model focuses on providing basic art education and organizing cultural events. Technically, the website uses basic JavaScript and Facebook SDK for social media integration but lacks advanced frameworks or CMS indications. The site is moderately optimized for performance and mobile use but could improve accessibility and SEO. From a security perspective, the website lacks visible security headers and privacy or cookie policies, which are important for GDPR compliance and user trust. The absence of WHOIS data raises concerns about domain registration legitimacy, although the website content appears genuine and consistent with a local educational institution. No WAF or blocking mechanisms were detected, and the site content is fully accessible. Overall, the website demonstrates moderate digital maturity with room for improvement in security posture, privacy compliance, and technical modernization. Strategic recommendations include implementing HTTPS, adding security headers, publishing privacy and cookie policies, and verifying domain registration details to enhance trustworthiness and compliance.

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

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

  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 zushlinsko.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
62
Security headers
15
Email security
70
DNS health
75
Network security
100
GDPR outside view
10
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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention zushlinsko.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for zushlinsko.cz right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

ZUŠ Hlinsko operates as a local basic art school providing music and visual arts education primarily to children and youth in Hlinsko, Czech Republic. The institution leverages community engagement through events and talent exams, positioning itself as a trusted educational provider with a 60-year tradition. The business model is non-commercial, focusing on educational services with potential partnerships such as iZUŠ and the website developer DUOWEB.cz. The website content and social media integration support outreach and communication with stakeholders. Growth indicators are limited but stable given the niche educational sector. The partnership ecosystem includes local educational networks and digital service providers.

Security posture

The website's security posture is basic and requires enhancement. No HTTPS status was confirmed from the data, and no security headers were detected, exposing the site to common web vulnerabilities. The lack of privacy and cookie policies indicates non-compliance with GDPR requirements, which is critical for sites handling personal data in the EU. No incident response or security contact information is provided, limiting the ability to report or respond to security issues. The use of Facebook SDK introduces third-party tracking but no analytics or advanced data collection mechanisms were found. Overall, the site is at moderate risk and should prioritize implementing standard web security best practices and compliance measures.

Recommendations

  1. Implement HTTPS with a valid SSL/TLS certificate to secure all communications.
  2. Add essential security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Publish comprehensive privacy and cookie policies to comply with GDPR and inform users.
  4. Establish a security incident response contact channel and disclose it on the website.
  5. Verify and update WHOIS domain registration information to improve trust and legitimacy.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
ZUŠ Hlinsko
Description
ZUŠ Hlinsko is a basic art school providing education in music and visual arts with a tradition of 60 years in Hlinsko, Czech Republic.
Key services
Music education, Visual arts education, Talent entrance exams, Organizing cultural events and concerts
Content quality
good
Branding
moderate

Technology

Stack
JavaScript, Facebook SDK
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
basic

Security

Observed score
40/100

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Tracking pixels
Facebook
Marketing tools
Facebook SDK
Transparency
basic

Site quality

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

Key observations

  1. Website content is fully accessible and not blocked by WAF or security mechanisms.
  2. No privacy or cookie policy pages detected, which is a compliance gap.
  3. Contact information is clearly provided in the footer with phone, email, and physical address.
  4. The site uses Facebook social plugins and scripts for social engagement.
  5. No forms detected on the main page; no data collection fields found.
  6. No security headers or HTTPS status information available from provided data.
  7. WHOIS data is missing, which is unusual and reduces domain trust.
  8. The website is focused on education and community engagement with event news and updates.
Technical notes

Notes

The website uses basic HTML5 with linked CSS and JavaScript files, including Facebook SDK for social media integration. No advanced frameworks or CMS platforms were detected. The site appears moderately optimized for desktop but only basic mobile responsiveness and accessibility features are present. Performance is average with no explicit indicators of optimization or caching strategies. The absence of structured data (JSON-LD or Open Graph tags) limits SEO potential. The technical debt is low but modernization opportunities exist, especially in adopting modern frameworks, improving SEO, and enhancing security configurations.
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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