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Security report for nej.cz

Nej.cz · Telecommunications · Czech Republic

Low risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

76/100

Risk levelLow

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

Nej.cz is a Czech telecommunications provider offering internet, digital television, and mobile calling services primarily targeting residential customers. The company is positioned as part of the O2 family, leveraging the strong brand and infrastructure of its parent company. Key services include optical internet, Oneplay digital TV combining O2 TV and Voyo, and advantageous mobile tariffs. The website reflects a professional and user-friendly digital presence with clear branding and comprehensive service information. Technically, the website employs a modern technology stack including jQuery, Leaflet, Google Tag Manager, Google Analytics, Hotjar, and Cookiebot for consent management. The site is mobile optimized and SEO friendly with structured data enhancing search visibility. Security measures include HTTPS enforcement and reCAPTCHA on forms, though explicit security headers are not detected, and the jQuery version is outdated, which could pose risks. From a security perspective, the site demonstrates good practices such as encrypted connections and privacy compliance with GDPR through clear policies and cookie consent. However, the absence of a published security policy, incident response contacts, and security headers suggests room for improvement. The WHOIS data is unavailable, which slightly reduces trust but does not indicate malicious intent given the strong brand association and transparency on the site. Overall, Nej.cz presents a trustworthy and professional online presence with solid business credibility and moderate to strong security posture. Strategic improvements in security headers, updated libraries, and incident response transparency would enhance the security maturity and trust further.

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

6 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

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook

      What to do: Document all third-party data sharing in your privacy policy

  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 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 nej.cz

This scan found 15 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
85
Security headers
80
Email security
80
DNS health
85
Network security
100
GDPR outside view
25
Average
76

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

Nej.cz operates in the competitive Czech telecommunications market as a significant player under the O2 brand umbrella. Its business model focuses on bundled telecommunications services targeting households and small businesses, offering internet, TV, and mobile calling packages. The company leverages its parent company's infrastructure and brand recognition to maintain a strong market position. Revenue streams likely derive from subscription fees for internet, digital TV, and mobile services, with additional income from bundled offers like O2 Spolu. The website indicates a focus on customer convenience with online contact forms, self-service portals, and clear pricing. Partnerships with O2 and technical providers like Beneš & Michl support operational capabilities. The company shows growth orientation through digital marketing, analytics, and customer engagement tools.

Security posture

Nej.cz exhibits a moderate to good security posture with HTTPS enforced site-wide and use of Google reCAPTCHA to protect forms from abuse. Cookie consent management via Cookiebot indicates GDPR compliance efforts. However, the absence of visible security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces defense-in-depth. The use of an outdated jQuery version (1.11.2) may expose the site to known vulnerabilities if not properly patched. No explicit security policy or incident response information is published, which limits transparency and preparedness perception. No vulnerabilities or exposed sensitive data were detected in the HTML content. Overall, the site is secure for general use but would benefit from enhanced security controls and documentation.

Recommendations

  1. Implement and publish a comprehensive security policy and incident response contact information on the website.
  2. Add critical security headers including CSP, HSTS, X-Frame-Options, and X-XSS-Protection to improve browser security.
  3. Upgrade jQuery and other JavaScript libraries to the latest stable versions to mitigate known vulnerabilities.
  4. Enhance accessibility features to improve compliance and user experience for all users.
  5. Maintain and regularly audit privacy and cookie consent mechanisms to ensure ongoing GDPR compliance.

Contact details published on the site

Addresses
Legal name
Nej.cz
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Nej.cz
Description
TELEVIZE - Digitální televize, Internet a Telefon
Key services
Optical internet, Digital television (Oneplay), Mobile calling and tariffs, Bundled packages (O2 Spolu)
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery 1.11.2, Leaflet 1.9.4, Google Tag Manager, Google Analytics, Hotjar, Google reCAPTCHA v2, Cookiebot
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Google reCAPTCHA for forms
  • Cookie consent management via Cookiebot
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Hotjar
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads
Tracking pixels
Hotjar
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 rich content and no blocking detected.
  2. WHOIS data is unavailable, likely due to registry policy or privacy protection.
  3. Strong branding and clear association with O2 telecommunications group.
  4. Multiple contact channels including phone, email, and contact form present.
  5. Cookie consent and privacy policies are implemented and GDPR compliant.
  6. Use of modern tracking and analytics tools with consent management.
  7. No explicit security policy or incident response information found.
  8. No security headers detected in provided data; recommend adding.
  9. Website design and UX are professional and user-friendly.
  10. No adult or questionable content detected; safe for general audience.
Technical notes

Notes

The website is built using a combination of legacy and modern web technologies. It uses jQuery 1.11.2, which is outdated and may pose security risks. Leaflet is used for mapping capabilities, and Google Tag Manager orchestrates analytics and marketing tags. Hotjar provides user behavior analytics, and Cookiebot manages cookie consent. The site is served over HTTPS with a valid SSL certificate, ensuring encrypted communication. Performance is moderate with asynchronous loading of scripts and lazy loading of images. The site is mobile responsive and SEO optimized with proper meta tags and structured data (JSON-LD). There is no detected CMS, suggesting a custom or proprietary platform. Hosting provider details are not disclosed. Overall, the technical implementation is solid but could be improved by updating libraries and adding security headers.
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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