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Security report for jaknazavolanou.cz

Plzeňský Prazdroj a.s. · Retail · Czech Republic

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

Security score

65/100

Risk levelMedium

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

The website jaknazavolanou.cz is a professionally designed marketing campaign platform for the Kozel beer brand, operated by Plzeňský Prazdroj a.s. It promotes a summer contest engaging consumers across multiple Czech cities with prizes including a beer-filled couch and branded merchandise. The site targets a mature audience interested in beer and social events, leveraging multimedia content and interactive forms to drive participation. Technically, the site uses modern JavaScript frameworks, Mapbox for mapping, and integrates Google Tag Manager and Cookiebot for analytics and privacy compliance. Security posture is good with HTTPS enforced and cookie consent mechanisms, though it lacks some security headers and published incident response policies. The absence of WHOIS data is likely due to privacy protection, which is justified for this commercial domain. Overall, the site is trustworthy, well-branded, and compliant with GDPR requirements.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 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 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

      Weak SSL Key Length

      SSL certificate uses 384-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching jaknazavolanou.cz

This scan found 19 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

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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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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
52
Security headers
50
Email security
85
DNS health
75
Network security
40
GDPR outside view
88
Average
65

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention jaknazavolanou.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for jaknazavolanou.cz right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Jaknazavolanou.cz serves as a strategic marketing tool for Plzeňský Prazdroj a.s., enhancing brand engagement through interactive contests and events. The business model focuses on consumer participation and brand loyalty in the Czech beer market. The campaign spans multiple cities, indicating a broad geographic reach and significant marketing investment. The company leverages digital channels effectively, integrating analytics and consent management to optimize user experience and compliance. The site’s clear contact information and contest rules enhance transparency and trust. No direct revenue streams are visible on the site, suggesting the campaign supports broader brand positioning rather than direct sales. The partnership ecosystem includes recognized services like Cookiebot and Google Tag Manager, supporting marketing and privacy functions.

Security posture

The website demonstrates a mature security posture with mandatory HTTPS and cookie consent mechanisms in place, reflecting compliance with privacy regulations such as GDPR. However, the absence of key security headers like Content-Security-Policy and X-Frame-Options represents a potential area for improvement to mitigate risks such as clickjacking and cross-site scripting. No vulnerabilities or exposed sensitive data were detected in the HTML content. The site lacks a published security policy or incident response contact, which could hinder rapid response to security incidents. The use of third-party scripts is standard but requires ongoing monitoring to avoid supply chain risks. Overall, the security posture is solid but could be enhanced by adopting additional HTTP security headers and publishing vulnerability disclosure information.

Recommendations

  1. Implement HTTP security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to strengthen defense against common web attacks.
  2. Publish a clear security policy and incident response contact information to improve transparency and readiness.
  3. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
  4. Regularly audit third-party scripts and dependencies to minimize supply chain risks.
  5. Enhance monitoring and logging capabilities to detect and respond to potential security incidents promptly.

Contact details published on the site

Addresses
Legal name
Plzeňský Prazdroj a.s.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Plzeňský Prazdroj a.s.
Description
Celé léto v ulicích Česka odměňujeme ty, na které je spoleh! Soutěž s Kozlem, kde lze vyhrát gauč plný piva, chatu na víkend a Kozlí merch. Soutěž probíhá v několika českých městech s pravidelnými indíciemi a výhrami.
Key services
Promotional contests, Brand marketing, Event-based consumer engagement
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Mapbox GL JS, Google Tag Manager, Cookiebot, HTML5, CSS3
Frameworks
Inertia.js
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of Cookie Consent mechanism
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics (via GTM)
Tracking level
moderate
Privacy practices
good

Advertising

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 a professional marketing campaign for Kozel beer brand.
  2. Content is rich with multimedia and interactive contest elements.
  3. No WHOIS data available, likely due to privacy protection or registry restrictions.
  4. Uses modern web technologies and good privacy compliance tools.
  5. No security headers detected in HTML source; recommend adding for enhanced security.
  6. No explicit security or incident response policies published.
  7. Contact info is clearly provided with company phone, email, and physical address.
  8. No suspicious or malicious content detected.
  9. Website targets mature audience due to alcohol-related content.
Technical notes

Notes

The website is built using modern web technologies including JavaScript modules, Inertia.js framework, and Mapbox GL JS for interactive maps. It employs Google Tag Manager for analytics and Cookiebot for cookie consent management, indicating a mature digital marketing infrastructure. The site is mobile-optimized with responsive design and good accessibility features. Performance appears fast with preloading of CSS and module scripts. No CMS is explicitly detected, suggesting a custom or headless architecture. Hosting provider details are not disclosed. The site uses HTTPS exclusively, ensuring encrypted communications. The technical implementation supports a high-quality user experience and effective marketing engagement, though security header enhancements are recommended.
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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