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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 and Security headers.

Security score

51/100

Risk levelMedium

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

Seduo.cz is a leading Czech online educational platform specializing in corporate and individual professional development. Operated by Alma Career Czechia s.r.o., it offers a comprehensive range of learning formats including video courses, webinars, podcasts, academies, and quick video tips. The platform targets companies and individual learners seeking flexible, accessible, and high-quality online training solutions. Seduo positions itself as the largest Czech platform in this sector, supported by a strong catalog of over 400 courses and 150 expert lecturers. Technically, the website is built on modern frameworks such as Next.js and React, hosted on AWS infrastructure, and supports mobile applications for Android and iOS, ensuring excellent mobile optimization and user experience. However, the site currently lacks a valid SSL certificate and HTTPS configuration, which is a critical security gap. While other security best practices are partially implemented, the absence of HTTPS significantly lowers the security posture. Privacy compliance is strong, with comprehensive GDPR-aligned policies and cookie consent mechanisms in place. Overall, Seduo.cz demonstrates a mature digital presence with excellent content quality and business credibility but requires urgent remediation of its SSL/TLS configuration to ensure secure user interactions and trust.

Scanned

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

NIS2 and GDPR posture

GDPR outside view
0/ 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 18 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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Full report

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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
50
Security headers
20
Email security
50
DNS health
85
Network security
100
GDPR outside view
0
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

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 operates in the education sector, focusing on online corporate training and personal development. Its business model revolves around subscription-based access to a wide range of educational content, supported by a user-friendly administration interface for companies. The platform serves medium-sized businesses primarily in the Czech Republic, with content also relevant for Slovak and Polish markets. Competitive advantages include a large and diverse content library, integration of multiple learning formats, and strong customer support. The company leverages partnerships with Alma Career entities for legal and privacy compliance. Growth indicators include continuous content expansion and feature flags indicating ongoing development of new functionalities. The platform's ecosystem includes mobile apps and integration with popular analytics and marketing tools, positioning it well for scalability and user engagement.

Security posture

The security posture of Seduo.cz is currently weak due to the absence of a valid SSL certificate and lack of HTTPS support, exposing users to potential data interception risks. While the site does not exhibit common vulnerabilities such as Heartbleed or POODLE, and DNS subdomain takeover risks are mitigated, the missing TLS encryption is a critical flaw. Security headers are minimal and do not include HSTS or OCSP stapling, which are recommended for enhanced security. No explicit incident response or security policy documents are found on the site. Privacy policies are comprehensive and GDPR compliant, indicating good data protection practices. Overall, the site requires immediate implementation of HTTPS and enhancement of security headers to meet industry best practices and protect user data effectively.

Recommendations

  1. Implement and maintain a valid SSL/TLS certificate to enable HTTPS across the entire site.
  2. Enable HTTP Strict Transport Security (HSTS) with includeSubDomains and preload directives.
  3. Configure OCSP stapling to improve certificate revocation checking and performance.
  4. Enhance security headers by adding Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options.
  5. Establish and publish a formal security policy and incident response plan accessible to users.
  6. Regularly audit and update third-party libraries and dependencies to avoid vulnerabilities.
  7. Improve transparency by adding a vulnerability disclosure policy or security.txt file.
  8. Continue to monitor and optimize privacy compliance and cookie consent mechanisms.
  9. Maintain and expand trust indicators such as certifications and customer testimonials.
  10. Optimize website performance and accessibility to sustain excellent user experience.

Contact details published on the site

Addresses
Legal name
Alma Career Czechia s.r.o.
Registration number
264 41 381
Technical notes

Notes

Seduo.cz is built on a modern technology stack centered around Next.js and React, enabling server-side rendering and efficient client-side interactivity. The platform uses HLS streaming for video content delivery and integrates Google Tag Manager and Sentry for analytics and error monitoring. Hosting is provided via Amazon AWS, as indicated by DNS nameservers. The site is well-optimized for mobile devices, with dedicated mobile applications for Android and iOS supporting offline usage. Performance metrics are not explicitly provided but inferred as moderate due to the use of chunked transfer encoding and preloading strategies. The site lacks a valid SSL certificate, which is a significant technical debt and security risk. SEO and accessibility are well addressed with proper meta tags, language attributes, and responsive design. Overall, the technical infrastructure supports a scalable and user-friendly educational platform but requires urgent security upgrades.
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 −1Medium30 findingsView report
  2. 63/100Medium29 findingsView report
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