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Security report for dosli.cz

Dosli · Education · Czech Republic

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

56/100

Risk levelMedium

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

Dosli.cz is a Czech educational software provider with over 20 years of experience developing digital teaching tools such as EduBase, DoTest, and EduRibbon. The company targets teachers and schools, offering software solutions to facilitate digital learning and interactive classroom activities, including tablet-based teaching environments. The website reflects a medium-sized, established business with a moderate market position in the Czech education sector. Technically, the site uses legacy JavaScript libraries like jQuery and Google Analytics for tracking, hosted likely by WEDOS, the domain registrar. The website design is good with clear navigation but lacks advanced mobile optimization and accessibility features. Security posture is moderate with HTTPS usage but no visible security headers or advanced protections. Privacy compliance is weak due to missing privacy and cookie policies and no consent mechanisms. No contact emails or phone numbers are explicitly provided, which may impact user trust and support accessibility. Overall, the domain registration data supports the legitimacy and long-term operation of the business.

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 dosli.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

€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
62
Security headers
20
Email security
70
DNS health
75
Network security
100
GDPR outside view
10
Average
56

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

Dosli.cz operates in the education sector, focusing on software development for digital teaching aids and interactive learning. Their business model revolves around software licensing and educational services, supported by partnerships with hardware providers like ASUS and participation in educational events and conferences. The company maintains a portfolio of related domains and brands, indicating a diversified product ecosystem. The target customers are primarily Czech educational institutions and teachers. The company shows growth indicators through event participation and product innovation, such as tablet classroom solutions. However, the lack of explicit contact information and privacy compliance may limit broader market trust and regulatory adherence.

Security posture

The website demonstrates a basic security posture with HTTPS enabled and no visible exposure of sensitive data. However, it lacks important security headers such as Content Security Policy, X-Frame-Options, and HSTS, which are critical for mitigating common web attacks. The use of older JavaScript libraries may pose potential vulnerabilities if not regularly updated. There is no visible incident response or vulnerability disclosure information, which limits transparency and preparedness for security incidents. Privacy compliance is insufficient, with no privacy or cookie policies and no consent mechanisms, exposing the company to regulatory risks under GDPR. Overall, the security maturity is moderate but requires significant improvements to align with best practices and compliance requirements.

Recommendations

  1. Implement comprehensive privacy and cookie policies with explicit user consent mechanisms to ensure GDPR compliance.
  2. Add and configure essential security headers such as Content Security Policy, HSTS, X-Frame-Options, and X-Content-Type-Options.
  3. Update JavaScript libraries to latest secure versions and audit for vulnerabilities.
  4. Provide clear contact information including company emails and phone numbers to enhance trust and support.
  5. Establish a vulnerability disclosure policy and incident response contact channels to improve security transparency and readiness.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Dosli
Description
Už více než 20 let pro vás vyvíjíme počítačové programy, které usnadňují vaši práci při přípravě digitálních učebních materiálů a umožňují vám jejich různorodé využití ve výuce. Pomáháme vám učit.
Key services
EduBase - digital teaching materials preparation, DoTest - test creation and examination software, EduRibbon - interactive online teaching platform, Tablet-based classroom solutions (TOGlic, ASUS Edu Class)
Content quality
good
Branding
moderate

Technology

Stack
jQuery, jQuery UI, Google Analytics, Custom JavaScript, CSS stylesheets
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
basic

Security

Observed score
60/100
Good practices seen
  • Use of Google Analytics asynchronously
  • No visible exposed sensitive data

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
poor

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is an established educational software provider with multiple product offerings.
  2. Content is primarily in Czech language targeting Czech educational institutions.
  3. No explicit privacy or cookie policies found, indicating compliance gaps.
  4. No contact emails or phone numbers explicitly provided on the main page.
  5. Use of Google Analytics for tracking without visible cookie consent mechanism.
  6. No visible security headers or advanced security policies detected.
  7. Website uses legacy JavaScript libraries like jQuery 1.8.16 and Google Analytics ga.js.
  8. Multiple external links to partner and related educational domains.
  9. No signs of adult or questionable content; content is safe for general audiences.
  10. WHOIS data supports domain legitimacy and long-term operation.
Technical notes

Notes

The website uses a traditional tech stack centered on jQuery and jQuery UI libraries, with asynchronous Google Analytics integration for user tracking. CSS stylesheets are custom and the site includes multiple JavaScript files for UI and AJAX functionality. Hosting appears to be with WEDOS, consistent with the domain registrar. Performance is moderate with some legacy scripts that may impact loading speed. Mobile optimization is basic, lacking responsive design elements beyond minimal adjustments. SEO is basic with meta description and keywords present but no advanced structured data or Open Graph tags detected. Accessibility features are minimal, with no ARIA roles or landmarks identified. The site could benefit from modernization including adoption of modern JavaScript frameworks, improved mobile responsiveness, and enhanced accessibility compliance.
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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