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Security report for sejf.cz

SEJF · Transportation · Czech Republic

Low risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

77/100

Risk levelLow

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

SEJF operates a modern mobile application platform focused on cashless payments for public transport tickets, parking, and entry tickets primarily in the Czech Republic. The company positions itself as a leading provider in this niche, offering a wide variety of payment options and a user-friendly experience. The website reflects a mature digital presence with professional design, clear content, and strong branding consistency. Technically, the site leverages modern frameworks such as Next.js and React, integrates with Cookiebot for privacy compliance, and uses Google Analytics and Tag Manager for analytics. Security posture is good with HTTPS enforced and cookie consent mechanisms in place, though explicit security headers could be improved. The absence of WHOIS data is typical for CZ NIC domains and does not detract from the site's legitimacy given the professional presentation and compliance with GDPR. Overall, SEJF demonstrates a solid business and technical foundation with room for enhanced security transparency and incident response readiness.

Scanned

NIS2 and GDPR posture

GDPR outside view
95/ 100 · Low
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

4 findings rated critical or high. Fix these first.

  1. 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';…

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

Need hands-on remediation? Email guard@offseq.com

Keep watching sejf.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.

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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
72
Security headers
15
Email security
95
DNS health
85
Network security
100
GDPR outside view
95
Average
77

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

SEJF targets users of public transport and parking services in the Czech Republic, offering a convenient mobile payment solution that integrates ticket purchasing and parking payments. The business model is based on providing a digital platform that simplifies payments and enhances user convenience. Partnerships with major mobile operators and banks (e.g., ČSOB) strengthen its market position. The company maintains a medium-sized operation with a focus on transportation sector digital services. The website's content and testimonials indicate a positive user reception and trust. The presence of official app store links and GDPR-compliant policies further support credibility. Strategic partnerships with local transport and parking authorities are evident from partner logos displayed. SEJF's growth potential lies in expanding payment options and enhancing user engagement through notifications and app features.

Security posture

The website enforces HTTPS and uses Cookiebot for cookie consent management, indicating a commitment to privacy and security compliance. However, explicit security headers such as X-Frame-Options, X-Content-Type-Options, and Referrer-Policy are not clearly present in the HTML, suggesting an area for improvement. No exposed sensitive data or vulnerable libraries were detected in the source. The payment process is secured via a reputable bank's payment gateway (ČSOB). There is no publicly available incident response or vulnerability disclosure information, which could be enhanced to improve transparency and trust. Overall, the security posture is solid but could benefit from additional security headers and published incident response contacts.

Recommendations

  1. Implement and verify standard security headers (X-Frame-Options, X-Content-Type-Options, Referrer-Policy) to enhance protection against common web attacks.
  2. Publish a security.txt or vulnerability disclosure policy to facilitate responsible reporting of security issues.
  3. Provide clear incident response contact information on the website to improve transparency and readiness.
  4. Regularly audit third-party scripts and dependencies to mitigate risks from external libraries.
  5. Enhance user trust by including more visible contact information and business credentials.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SEJF
Description
The SEJF mobile app is a modern, safe and reliable tool for cashless payments anytime and anywhere. Only with the SEJF app can you pay for parking tickets, purchase public transport tickets or entry tickets.
Key services
Public transport ticket purchasing, Parking payment, Entry ticket purchasing
Content quality
excellent
Branding
consistent

Technology

Stack
Next.js, React, Cookiebot, Google Tag Manager, Google Analytics
Frameworks
Next.js
Platforms
Web, Android, iOS
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • Secure payment gateway usage (ČSOB bank mentioned)

Analytics and tracking

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

Advertising

Tracking pixels
Cookiebot
Marketing tools
Cookiebot
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 no blocking or WAF challenges.
  2. Content is professionally presented and focused on a mobile payment app for transport and parking.
  3. Cookie consent and privacy policies are implemented with Cookiebot.
  4. No direct contact emails or phone numbers found on the main site.
  5. WHOIS data is unavailable, typical for CZ NIC domains.
  6. Website uses modern web technologies including Next.js and React.
  7. Security headers are not explicitly visible but HTTPS is enforced.
  8. No signs of malware, phishing, or suspicious domains.
  9. App store badges link to official Google Play and Apple App Store pages.
  10. No explicit security incident response or vulnerability disclosure pages found.
Technical notes

Notes

The website is built using Next.js and React, indicating a modern and scalable frontend architecture. It uses Strapi as a headless CMS for content management. Analytics and tag management are handled via Google Tag Manager and Google Analytics. Cookie consent is managed by Cookiebot, ensuring compliance with privacy regulations. The site is mobile-optimized with responsive design and fast loading images. Hosting details are not explicitly identified but the presence of CDN-hosted assets suggests cloud hosting. Performance is moderate with good SEO and accessibility practices observed. There is no indication of legacy or vulnerable technologies. Overall, the technical infrastructure supports a robust and user-friendly digital experience.
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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