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Security report for pb.cz

Nej.cz · Telecommunications · Czech Republic

Low risk. 3 critical or high findings in Security headers and SSL/TLS.

Security score

85/100

Risk levelLow

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

Nej.cz is a Czech telecommunications provider offering internet, digital television, and telephone services primarily targeting personal and business customers within the Czech Republic. The company operates as part of the O2 group, leveraging its infrastructure and service platforms. The website presents a professional and consistent brand image with clear service offerings and customer support channels. Technically, Nej.cz employs modern web technologies including Google Tag Manager, Google Analytics, Cookiebot for consent management, Hotjar for user behavior analytics, and reCAPTCHA for form security. The site is well-optimized for mobile devices and includes comprehensive cookie consent mechanisms aligned with GDPR requirements. Security posture is strong with HTTPS enforcement and appropriate security headers, though explicit security policies and incident response contacts are not published. The absence of WHOIS data reduces transparency but does not detract significantly from the site's legitimacy given the business context and content quality. Overall, Nej.cz demonstrates a mature digital presence with good security and privacy compliance, suitable for its telecommunications market segment.

Scanned

NIS2 and GDPR posture

GDPR outside view
100/ 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

3 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 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
    • High

      SSL Certificate Expires Soon

      SSL certificate expires in 11 days

      What to do: Renew SSL certificate before expiration

      • NIS2 21(2)(h)
      • IR 2024/2690 9.2(c): Implementing Regulation (EU) 2024/2690, Annex point 9.2(c): Cryptography
      • NIST SC-17: NIST SP 800-53 Rev. 5 SC-17: Public Key Infrastructure Certificates

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

Keep watching pb.cz

This scan found 14 issues across 5 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

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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
62
Security headers
80
Email security
80
DNS health
85
Network security
100
GDPR outside view
100
Average
85

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 holds a solid position as a regional telecommunications provider in the Czech Republic, offering bundled services of internet, television, and mobile calling. Its affiliation with O2 provides competitive advantages including access to established infrastructure and customer management platforms. The business model focuses on both personal and corporate customers, with dedicated sections for each. Revenue streams likely include subscription fees for internet and TV packages, mobile services, and wholesale offerings. The company maintains a partnership ecosystem including O2 and related service platforms such as cmb.o2.cz. Growth indicators include active marketing and analytics usage, and a comprehensive cookie consent framework indicating regulatory awareness. Strategic observations suggest continued investment in digital marketing and customer experience enhancements to maintain market share.

Security posture

The website exhibits a good security maturity level with enforced HTTPS, modern security headers, and use of reCAPTCHA to protect forms from automated abuse. Cookie consent is granular and transparent, supporting GDPR compliance. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of a publicly available security policy or incident response contact limits transparency and readiness perception. There is no evidence of a vulnerability disclosure program or security.txt file. Overall, the security posture is solid but could be improved by publishing formal security policies and incident response procedures to enhance trust and compliance.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and controls.
  2. Establish and publicize an incident response contact email (e.g., security@nej.cz or abuse@nej.cz).
  3. Implement and disclose a vulnerability disclosure or bug bounty program to encourage responsible reporting.
  4. Add data protection officer contact information to comply fully with GDPR transparency requirements.
  5. Enhance website accessibility features to improve compliance with accessibility standards.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Nej.cz
Description
TELEVIZE - Digitální televize, Internet a Telefon
Key services
Internet, Television, Mobile calling
Content quality
good
Branding
consistent

Technology

Stack
Google Tag Manager, Google Analytics, Cookiebot, Leaflet.js, Hotjar, reCAPTCHA
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with granular controls
  • Use of reCAPTCHA for forms
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Hotjar
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Etarget, Meta Platforms, Inc.
Tracking pixels
Cookiebot, Hotjar, Facebook Pixel, Seznam.cz retargeting
Marketing tools
Cookiebot, Hotjar
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenge.
  2. Comprehensive cookie consent mechanism implemented with detailed cookie classification.
  3. Multiple third-party analytics and marketing tools in use.
  4. WHOIS data unavailable, which reduces transparency but not necessarily legitimacy.
  5. Contact information is clearly provided with multiple channels.
  6. Website content is professional and consistent with telecommunications industry.
  7. No explicit or adult content detected.
  8. Security headers and HTTPS are properly configured.
Technical notes

Notes

The website uses a modern technology stack including Google Tag Manager, Google Analytics, Cookiebot for consent management, Hotjar for behavioral analytics, and Leaflet.js for map functionality. The site loads external scripts asynchronously to optimize performance. Meta tags and structured data (JSON-LD) are well implemented for SEO and rich results. The site is mobile responsive with good navigation clarity. No CMS was explicitly detected, suggesting a custom or proprietary platform. Hosting provider details are not disclosed. Performance is moderate with room for optimization. Accessibility is basic but functional. Overall, the technical infrastructure supports a professional and user-friendly experience with opportunities for further modernization and performance tuning.
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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