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Security report for slu.cz

Slezská univerzita v Opavě · Education · Czech Republic

Medium risk. 6 critical or high findings in GDPR outside view and Security headers.

Security score

67/100

Risk levelMedium

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

Slezská univerzita v Opavě is a regional public university in the Czech Republic offering higher education, research, and community services. The website serves as the official portal providing information about faculties, study programs, research activities, events, and student support. It targets prospective and current students, academic staff, and the general public interested in university affairs. The site demonstrates a consistent brand identity with official logos and certifications such as HR Excelence in Research, supported by EU and government partnerships. Technically, the website uses a modern technology stack including jQuery, Bootstrap, FontAwesome, and analytics tools like Matomo and Google Analytics. The site is mobile-optimized, accessible, and features good SEO practices. Some minor HTML issues were detected, such as malformed preconnect and dns-prefetch tags, which should be corrected to improve performance and security. From a security perspective, the site enforces HTTPS and includes cookie consent mechanisms, but lacks visible security headers in the provided data. No sensitive data exposure or vulnerable libraries were detected. The absence of WHOIS data limits domain registration trust analysis, but the official nature of the site and consistent branding strongly indicate legitimacy. Overall, the website is professional, secure, and compliant with privacy regulations, providing a safe and informative experience for its users. Strategic improvements include fixing minor HTML errors, adding security headers, and publishing explicit security and incident response policies.

Scanned

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

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

      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 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';…

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Keep watching slu.cz

This scan found 21 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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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
85
Security headers
35
Email security
85
DNS health
70
Network security
100
GDPR outside view
25
Average
67

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 university holds a stable market position as a medium-sized educational institution in the Czech Republic, offering diverse academic programs and research opportunities. It benefits from partnerships with government bodies and European initiatives, enhancing its credibility and funding. The business model focuses on public education and research, with additional services like lifelong learning and career support. The website reflects a mature digital presence with integrated social media and partner links, supporting outreach and engagement. Growth indicators include active event calendars and news updates, signaling ongoing institutional activity and community involvement.

Security posture

The security posture is moderate to good, with HTTPS enforced and cookie consent implemented, indicating awareness of privacy and security standards. However, the lack of visible security headers such as Content-Security-Policy and X-Frame-Options suggests room for improvement. The use of multiple third-party scripts requires ongoing monitoring to mitigate vulnerabilities. No incident response or security policy pages were found, which could enhance transparency and preparedness. The absence of WHOIS data is a concern but likely due to registry policies rather than malicious intent. Overall, the site maintains a secure environment suitable for its educational purpose.

Recommendations

  1. Correct malformed preconnect and dns-prefetch link tags to ensure proper resource loading and security.
  2. Implement standard security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Publish a clear security policy and incident response contact information to improve transparency and trust.
  4. Regularly audit and update third-party scripts and analytics tools to minimize vulnerabilities.
  5. Obtain and maintain complete WHOIS registration data to enhance domain trustworthiness and compliance.

Contact details published on the site

Addresses
Legal name
Slezská univerzita v Opavě
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Slezská univerzita v Opavě
Description
Webové stránky Slezské univerzity v Opavě, a educational institution providing university-level education, research, and community services.
Key services
Higher education programs, Research and scientific activities, Lifelong learning, Student support and career services, Cultural and community events
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Bootstrap, FontAwesome, Matomo Analytics, Google Tag Manager, Google Analytics, Facebook Pixel, Nette Framework (ajax.js), Revolution Slider, Lightbox, Fancybox, Toastr
Frameworks
Nette Framework
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • Use of modern JS libraries with deferred loading

Analytics and tracking

Services
Matomo, Google Analytics, Facebook Pixel
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads, Sklik (Seznam.cz)
Tracking pixels
Facebook Pixel, Matomo
Marketing tools
Toastr
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with rich content and navigation.
  2. No WAF or security blocking detected.
  3. WHOIS data unavailable, limiting domain registration trust analysis.
  4. Cookie consent banner present and functional.
  5. Multiple official social media and partner links included.
  6. Use of modern web technologies and analytics tools.
  7. Some minor HTML issues with malformed link tags.
  8. No visible security headers in provided data; recommend adding.
  9. No privacy or security policy pages explicitly found except basic privacy info.
  10. No visible contact forms collecting personal data on homepage.
Technical notes

Notes

The website infrastructure is built on a combination of popular JavaScript libraries and frameworks such as jQuery, Bootstrap, and Nette Framework for AJAX functionality. It integrates advanced UI components like Revolution Slider, Lightbox, and Fancybox for enhanced user experience. Analytics are handled via Matomo, Google Analytics, and Facebook Pixel, with Google Tag Manager orchestrating tags. The site is mobile responsive and accessible, with good SEO metadata. Minor technical debt is noted in malformed link tags which could affect performance and security. Hosting details are not explicitly available, but the site uses HTTPS with a presumably strong SSL configuration. Overall, the technical implementation supports a robust and user-friendly educational portal.
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. 68/100Medium28 findingsView report
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