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Security report for zestolu.cz

Media · Czech Republic

Medium risk. 6 critical or high findings in Email security, Security headers and 2 other checks.

Security score

69/100

Risk levelMedium

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

ZeStolu.cz is a Czech-language media website focused on board games, wargaming, and tabletop RPGs (TTRPG). It provides news, reviews, event calendars, video content, and community discussion forums targeting enthusiasts in this niche. The site demonstrates consistent branding and regularly updated content, positioning itself as a specialized information hub within the Czech gaming community. Technically, the website employs modern web technologies including Google Analytics, Microsoft Clarity, and Google Adsense for analytics and monetization. It uses HTTPS and responsive design, ensuring good accessibility and user experience across devices. Security posture is adequate with HTTPS enforced and no obvious vulnerabilities, though explicit security headers and vulnerability disclosure mechanisms are absent. Privacy compliance is basic; no explicit privacy or terms of service pages were found, though a cookie consent mechanism is present. The absence of WHOIS registrant data limits domain trust verification, but the site appears professionally maintained. Overall, ZeStolu.cz is a well-structured niche media platform with moderate security and privacy maturity, suitable for its target audience.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 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

6 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

    • High

      No SPF record found

      SPF helps prevent email spoofing

      What to do: Add SPF record: "v=spf1 include:_spf.yourmailprovider.com ~all"

  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 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';…

  3. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

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

Keep watching zestolu.cz

This scan found 22 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
72
Security headers
40
Email security
40
DNS health
75
Network security
100
GDPR outside view
85
Average
69

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 zestolu.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for zestolu.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

The website serves a niche market of Czech board game and RPG enthusiasts, offering news, reviews, and community engagement. Its business model centers on content publishing supported by advertising networks such as Google Adsense and PubMatic. The site leverages partnerships within the Tiscali network and integrates social media channels for broader reach. Growth indicators include frequent content updates and active discussion forums. The platform's competitive advantage lies in its specialized focus and localized content. Revenue streams likely derive from advertising and possibly sponsored content. The absence of explicit company registration or contact details suggests a small or independent operation. Strategic observations include the need to enhance privacy transparency and security disclosures to build greater trust.

Security posture

ZeStolu.cz maintains a basic but effective security posture with HTTPS enabled and no visible exposure of sensitive data. The site uses multiple third-party analytics and advertising scripts, which introduces some risk but no known vulnerabilities were detected in the content. The lack of explicit security headers such as Content-Security-Policy and X-Frame-Options is a gap that could be exploited. No security.txt or vulnerability disclosure policy is published, limiting incident response readiness. Privacy compliance is minimal, with no clear privacy policy or terms of service pages found. Overall, the site demonstrates moderate security maturity appropriate for a content publishing platform but should improve transparency and technical controls to mitigate risks.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service pages to improve legal compliance and user trust.
  2. Implement and enforce security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Create and publish a security.txt file to facilitate vulnerability disclosure and incident response.
  4. Enhance accessibility features to improve usability for all users.
  5. Regularly audit third-party scripts and dependencies to identify and mitigate potential vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
ZeStolu.cz je zpravodajský a databázový web o deskových hrách, wargamingu a stolních hrách na hrdiny neboli TTRPG.
Key services
News articles, Game reviews, Event calendar, Discussion forums, Video content, Game catalog
Content quality
good
Branding
consistent

Technology

Stack
Google Analytics, Google Tag Manager, Microsoft Clarity, Google Adsense, PubMatic, Gemius, jQuery (implied by legacy scripts), Bootstrap (implied by navbar classes), Tiscali navigation scripts
Frameworks
Bootstrap
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of async loading for scripts

Analytics and tracking

Services
Google Analytics, Microsoft Clarity, Gemius
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Google Adsense, PubMatic, Adscale
Tracking pixels
Microsoft Clarity, Gemius
Transparency
good

Site quality

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

Key observations

  1. Website is content-rich with frequent updates and active community features.
  2. No explicit privacy or terms of service pages found in the provided content.
  3. Multiple third-party analytics and advertising scripts are used.
  4. No contact emails or phone numbers explicitly found in the HTML content.
  5. WHOIS data is unavailable, limiting domain trust verification.
  6. Website uses HTTPS and modern web technologies.
  7. No security.txt or vulnerability disclosure information found.
  8. Cookie consent mechanism is present but no explicit cookie policy page detected.
  9. Social media presence on Facebook and Instagram is evident.
  10. Website is in Czech language targeting Czech-speaking board game enthusiasts.
Technical notes

Notes

The website uses a modern tech stack including Google Analytics, Microsoft Clarity, Google Tag Manager, and advertising networks such as Google Adsense and PubMatic. It employs Bootstrap for responsive design and Tiscali-specific navigation scripts. Performance is moderate with asynchronous loading of scripts to optimize page load times. SEO is supported by appropriate meta tags and Open Graph data. Accessibility is basic but could be improved. Hosting provider details are not evident from the content. The site is mobile optimized and uses HTTPS, but lacks some advanced security headers. Technical debt appears low, but improvements in security and privacy transparency 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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