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Security report for seduo.cz

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 a wide range of video courses, webinars, podcasts, and corporate training administration tools. It serves both corporate clients and individual learners, offering flexible, on-demand learning accessible via web and mobile applications. The platform is part of the Alma Career group, a reputable parent company with multiple subsidiaries in the Central European job and education market. Technically, the website is built on modern frameworks such as Next.js and React, with secure video streaming and a responsive design optimized for mobile devices. Security posture is strong with HTTPS enforcement and comprehensive security headers, though the absence of WHOIS registration data slightly reduces trustworthiness. Privacy and cookie policies are well implemented and GDPR compliant. Overall, Seduo.cz presents a professional, trustworthy, and technically mature online learning service with a strong market position in the Czech Republic.

Scanned

This is an earlier scan of seduo.cz. View the latest report

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 seduo.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.

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

Email alerts on material changes and an exportable JSON history of every change.

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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 dominant position in the Czech online education market, targeting businesses seeking scalable employee training solutions and individuals pursuing personal growth. Its subscription-based model offers unlimited access to a diverse content library curated by top Czech and Slovak experts. The platform's integration with Alma Career's ecosystem enhances its reach and credibility. The business benefits from strong branding, customer testimonials, and case studies demonstrating effectiveness. Its growth is supported by mobile accessibility and a user-friendly corporate administration interface. Strategic partnerships within the Alma Career group provide synergies in recruitment and career development services. The lack of public WHOIS data is a minor concern but does not detract significantly from its established market presence.

Security posture

The website demonstrates a mature security posture with HTTPS enforced site-wide, robust security headers including CSP, HSTS, and X-Frame-Options, and secure media streaming via signed URLs. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, there is no publicly disclosed vulnerability disclosure policy or security.txt file, and incident response contact information is not explicitly provided. Tracking and marketing scripts are present but appear standard and privacy-conscious. Overall, the platform balances security and usability effectively but could improve transparency around security incident handling.

Recommendations

  1. Publish a vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  2. Provide explicit incident response contact details (e.g., security@ or abuse@ email) on the website.
  3. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.
  4. Enhance transparency around data retention policies and user privacy controls.
  5. Consider publishing WHOIS data or clarifying domain registration details to improve trust signals.
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, Media Controller (custom video player), HLS streaming
Frameworks
Next.js
Platforms
Web, Mobile (Android, iOS apps)
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

Analytics and tracking

Services
Google Analytics via Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Facebook Pixel, Seznam.cz 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 and no blocking detected
  2. Professional educational platform focused on corporate and individual learning
  3. Strong branding and parent company affiliation with Alma Career Oy
  4. Comprehensive privacy and cookie policies present
  5. No WHOIS data available, which is unusual and may warrant further investigation
  6. Use of modern web technologies and good security practices
  7. Clear contact information with company domain emails and phone numbers
  8. No signs of adult or questionable content
Technical notes

Notes

Seduo.cz leverages a modern technology stack centered on React and Next.js, enabling server-side rendering and optimized performance. The use of Apollo GraphQL indicates a sophisticated API layer for data fetching. Media content is delivered via HLS streaming with custom media controllers, ensuring compatibility and smooth playback. The site is well-optimized for mobile devices and includes accessibility features. SEO is supported by appropriate meta tags and structured data. No CMS is explicitly detected, suggesting a custom or headless approach. Hosting provider details are not disclosed. Performance is fast with preloading and prefetching of critical assets. Overall, the technical implementation reflects a contemporary, scalable, and user-centric 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

Earlier scans of this domain

  1. 62/100 +11Medium30 findingsView report
  2. 51/100Medium25 findingsView report
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