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Security report for seduo.com

Alma Career Czechia 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

63/100

Risk levelMedium

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

Seduo.cz is a leading Czech online educational platform specializing in professional and personal development through video courses, webinars, podcasts, and corporate training administration. It is part of the Alma Career group, a well-established entity in Central Europe with multiple related job and education portals. The platform targets both businesses and individual learners, offering a comprehensive and accessible learning experience with a strong focus on quality content and user engagement. Technically, the website employs modern web technologies including Next.js, React, Apollo GraphQL, and secure HLS video streaming, ensuring a fast, mobile-optimized, and accessible user experience. Security posture is strong with HTTPS enforcement, appropriate security headers, and no visible vulnerabilities or sensitive data exposure. Privacy compliance is well addressed with clear privacy and cookie policies, GDPR adherence, and user consent mechanisms. Overall, Seduo.cz presents a professional, trustworthy, and mature digital presence suitable for its market and business objectives.

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';…

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Keep watching seduo.com

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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  • 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
77
Security headers
20
Email security
75
DNS health
80
Network security
100
GDPR outside view
25
Average
63

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

Seduo.cz holds a strong market position as the largest Czech online learning platform for corporate and individual education. Its subscription-based business model offers unlimited access to a wide range of educational content, supported by a mobile app and corporate administration tools. The platform benefits from the backing of Alma Career Oy, which provides a broad ecosystem of related services and partner sites across Central Europe. This affiliation enhances credibility and market reach. The company focuses on delivering high-quality content from recognized Czech and Slovak experts, catering to diverse learning needs from soft skills to technical competencies. The presence of case studies and testimonials further strengthens its market appeal. Growth potential is supported by digital maturity and a comprehensive service offering.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, comprehensive security headers, and secure video streaming mechanisms using signed URLs. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The use of third-party marketing and analytics tools is balanced with consent mechanisms, supporting privacy compliance. However, the absence of a public vulnerability disclosure policy or security.txt file and lack of explicit incident response contact details represent areas for improvement. Overall, the platform is secure for its intended use, but formalizing security policies and incident response processes would enhance trust and readiness.

Recommendations

  1. Publish a public vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  2. Provide explicit incident response contact information (e.g., security@ or abuse@ email) on the website.
  3. Regularly review and audit third-party scripts and tracking tools to ensure ongoing privacy compliance and minimize data exposure.
  4. Enhance transparency by linking to detailed data retention policies and cookie management options.
  5. Continue investing in accessibility improvements and mobile optimization to maintain excellent user experience across devices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Alma Career Czechia s.r.o.
Description
Největší česká online vzdělávací platforma. Nejvíce vzdělávacích témat pro profesní a osobní rozvoj na jednom místě. TOP lektoři. Vyzkoušejte ho zdarma.
Key services
Online video courses, Webinars, Podcasts, Corporate training administration, Mobile app for learning
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Apollo GraphQL, HLS video streaming, Media Controller API, Google Tag Manager, Intercom, Facebook Pixel, Seznam tracking
Frameworks
Next.js
Platforms
Web, Android app, iOS app
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Security headers present
  • No exposed sensitive data in HTML
  • Secure video streaming with signed URLs
  • No visible vulnerable libraries

Analytics and tracking

Services
Google Analytics (via GTM)
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Facebook Pixel, Seznam tracking
Marketing tools
Intercom
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content
  2. No WAF or blocking detected
  3. Professional educational platform targeting Czech and Slovak markets
  4. Strong parent company affiliation with Alma Career
  5. Comprehensive privacy and terms policies linked
  6. Multiple contact channels clearly provided
  7. Modern tech stack with good security practices
  8. No visible security vulnerabilities or exposed sensitive data
  9. Good SEO and accessibility features
  10. Use of multiple tracking and marketing tools with consent mechanisms
Technical notes

Notes

Seduo.cz is built on a modern technology stack featuring React and Next.js frameworks, Apollo GraphQL for data management, and HLS streaming for video content delivery. The site is well-optimized for performance and mobile responsiveness, with good SEO and accessibility practices evident. The use of multiple prefetch and preload directives indicates attention to loading speed. Integration with marketing and analytics tools like Google Tag Manager, Facebook Pixel, and Intercom is implemented with asynchronous loading to minimize impact on performance. No CMS was explicitly detected, suggesting a custom or headless architecture. Hosting provider details were not identified from the content. Overall, the technical infrastructure supports a scalable, secure, and user-friendly platform.
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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