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Security report for izus.cz

Sensio.cz s.r.o. · Education · Czech Republic

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

Security score

51/100

Risk levelMedium

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

iZUŠ is a specialized information system designed to support basic art schools in the Czech Republic and Slovakia by providing electronic document management, communication tools, and administrative functionalities for school staff, teachers, parents, and students. The platform offers a comprehensive suite of services including attendance tracking, scheduling, payment management, and reporting, positioning itself as a leading SaaS solution in its niche market. The website is professionally designed, multilingual, and accessible, reflecting a mature digital infrastructure. Technically, it leverages modern web technologies such as PHP, MySQL, JavaScript libraries, and internationalization frameworks, ensuring a responsive and user-friendly experience. Security measures include HTTPS enforcement and content security policies, though there is room for enhancement with additional headers and published security policies. The absence of WHOIS data is a notable gap that slightly diminishes domain trustworthiness, but the clear company attribution and active social media presence support the platform's legitimacy. Overall, iZUŠ demonstrates a solid security posture and compliance with privacy regulations, including cookie consent mechanisms. Strategic recommendations include improving WHOIS transparency, publishing security and incident response policies, and enhancing security headers to further strengthen trust and resilience.

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

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

  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 izus.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.

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
85
Security headers
20
Email security
70
DNS health
85
Network security
20
GDPR outside view
25
Average
51

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 izus.cz, from OffSeq Breach.

Total records
1,588
Employees
0
Customers
1,588
Third parties
0
Weak passwords
8%

6 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for izus.cz.

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Breach keeps ingesting new leaks, so these numbers can grow between scans.

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Technical appendix

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

Business context

Business profile

The business operates in the education sector, targeting basic art schools, their teachers, students, and parents. It offers a SaaS model with optional training and support, enabling schools to digitize and streamline administrative and pedagogical processes. The company Sensio.cz s.r.o. develops and maintains the platform, which has been operational since at least 2011. The platform's competitive advantages include tailored functionalities for art schools, multilingual support, and integration of communication and administrative workflows. Revenue streams likely include subscriptions, training services, and technical support. The presence of social media channels and detailed help resources indicates a mature customer engagement strategy. The lack of WHOIS transparency is a minor concern but does not detract significantly from the business credibility given the visible company branding and content quality.

Security posture

The website enforces HTTPS and includes a Content-Security-Policy header, indicating a commitment to secure communications and content integrity. Password fields include visibility toggles enhancing usability without compromising security. Cookies are set with Secure and SameSite attributes, and a cookie consent banner is implemented, supporting privacy compliance. However, additional security headers such as X-Frame-Options, X-XSS-Protection, and Strict-Transport-Security are absent and recommended. No exposed sensitive data or vulnerable libraries were detected in the analysis. The absence of a published security policy or incident response contact limits transparency and preparedness visibility. Overall, the security posture is good but could be improved with enhanced header configurations and formalized policies.

Recommendations

  1. Publish complete WHOIS information or ensure domain registration data is publicly accessible to improve trust.
  2. Implement additional HTTP security headers including X-Frame-Options, X-XSS-Protection, and Strict-Transport-Security.
  3. Publish a clear security policy and incident response contact information on the website.
  4. Regularly audit and update third-party libraries to mitigate potential vulnerabilities.
  5. Enhance user awareness and trust by providing visible certifications or compliance badges where applicable.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Sensio.cz s.r.o.
Description
iZUŠ is an information system designed for basic art schools, facilitating electronic document management, communication, and administrative tasks for school staff, teachers, parents, and students.
Key services
Electronic document management, Student and teacher administration, Communication platform for schools, parents, and students, Class scheduling and attendance tracking, Payment and invoicing management
Content quality
good
Branding
consistent

Technology

Stack
PHP, MySQL, JavaScript, jQuery, i18next (internationalization), Photoswipe (image gallery), Swiper (carousel), Google Fonts (Exo), Google Ads conversion tracking
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Content-Security-Policy header present
  • Password fields with toggle visibility
  • Cookie settings with Secure and SameSite=None flags
  • Daily data backups mentioned

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Ad networks
Google Ads
Tracking pixels
Google Ads conversion tracking
Marketing tools
Google Ads
Transparency
good

Site quality

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

Key observations

  1. Website is a professional educational SaaS platform for basic art schools in Czech Republic and Slovakia.
  2. Content is comprehensive, multilingual (Czech and Slovak), and well-structured.
  3. Strong focus on user roles: school management, teachers, parents, and students.
  4. No WHOIS data available, which is unusual and lowers domain trust score.
  5. Security practices are good but could be improved with additional headers and policies.
  6. Cookie consent is implemented with clear user controls.
  7. No direct contact emails or phone numbers found on homepage; contact likely via contact page.
  8. Social media presence on Facebook and YouTube is active.
  9. No signs of adult or questionable content.
  10. No WAF or blocking detected; site fully accessible.
Technical notes

Notes

The website uses a PHP and MySQL backend with a JavaScript frontend leveraging libraries such as jQuery, i18next for internationalization, Photoswipe for image galleries, and Swiper for carousels. Google Fonts and Google Ads conversion tracking are integrated. The site is mobile responsive and includes accessibility features such as skip links and adjustable font sizes. Performance is moderate with minified CSS and JS assets. The site uses a Content-Security-Policy header to upgrade insecure requests, enhancing security. No CMS was detected, suggesting a custom or proprietary platform. Hosting provider details are not disclosed. Overall, the technical infrastructure is modern and well-maintained, supporting a good user experience and security baseline.
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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