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Security report for bigmedia.cz

BigMedia · Media · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

50/100

Risk levelMedium

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

BigMedia is a leading outdoor advertising company in the Czech Republic, operating since 2001 and part of the BigBoard group. The company offers a comprehensive portfolio of advertising formats including traditional billboards, digital out-of-home advertising, metro and transport advertising, and provides advanced campaign planning and measurement tools. Their website reflects a mature digital presence with modern technologies such as Nuxt.js and integrates marketing and analytics tools effectively. Security posture is good with HTTPS and standard best practices, though some security headers could be improved. Privacy compliance is strong with clear policies and consent mechanisms. Overall, the company demonstrates high business credibility and professionalism, serving advertisers seeking impactful outdoor advertising solutions in the Czech market.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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

7 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

  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 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';…

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

Keep watching bigmedia.cz

This scan found 26 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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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
15
Email security
60
DNS health
80
Network security
40
GDPR outside view
40
Average
50

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

BigMedia holds a dominant market position in the Czech outdoor advertising sector, leveraging a large network of advertising spaces and digital platforms. Their business model focuses on providing advertisers with diverse and innovative advertising formats, including digital and transport-based media. The company benefits from being part of the BigBoard group, enhancing its market reach and resource access. Their target customers are marketing professionals and brands aiming for broad or targeted outdoor campaigns. The presence of a dedicated e-shop and multiple partner domains indicates a diversified service ecosystem. Growth indicators include advanced measurement tools and creative campaign showcases, positioning BigMedia as a technologically forward and customer-centric provider.

Security posture

The website employs HTTPS and integrates security best practices such as asynchronous loading of third-party scripts and no visible exposure of sensitive data. However, explicit security headers like Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options are not clearly present and should be implemented to enhance protection against common web attacks. No vulnerabilities or malware indicators were detected. Privacy policies and cookie consent mechanisms are in place, supporting GDPR compliance. Incident response and security policy documentation are not publicly found, which could be improved to demonstrate security maturity. Overall, the security posture is solid but could benefit from additional header configurations and transparency on incident handling.

Recommendations

  1. Implement Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options headers to strengthen web security.
  2. Publish a clear security policy and incident response plan accessible to users and partners.
  3. Regularly audit and update third-party scripts to mitigate potential vulnerabilities.
  4. Enhance accessibility features to improve compliance and user experience for all users.
  5. Maintain transparency on data retention policies and provide users with clear options for data management.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
BigMedia
Description
BigMedia is the largest provider of outdoor advertising in the Czech Republic, offering a wide range of advertising formats including billboards, bigboards, digital advertising in shopping centers, transport vehicles, metro, and public transport stops.
Key services
Billboards, Bigboards, Digital OOH advertising, Advertising in metro and public transport, Advertising on transport vehicles, Campaign planning and measurement tools
Content quality
excellent
Branding
consistent

Technology

Stack
Vue.js (Nuxt.js framework), Google Tag Manager, Smartsupp Chat, Active24 hosting
Frameworks
Nuxt.js
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enabled
  • No exposed sensitive data in HTML
  • Use of Google Tag Manager and Smartsupp chat scripts asynchronously

Analytics and tracking

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

Advertising

Tracking pixels
Seznam.cz tracking, Leady.com tracking
Marketing tools
Smartsupp Chat
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and well-structured.
  2. Content is comprehensive and relevant to outdoor advertising.
  3. Strong presence of privacy and cookie policies with consent mechanisms.
  4. Contact information is clearly provided with company domain email and phone number.
  5. No signs of malicious or suspicious activity.
  6. Use of modern web technologies and frameworks.
  7. Good integration of marketing and analytics tools.
  8. No WAF or blocking mechanisms detected.
Technical notes

Notes

The website is built using modern web technologies, primarily Nuxt.js (Vue.js framework), ensuring a responsive and dynamic user experience. Hosting is provided by Active24, a reputable Czech hosting provider. Performance is moderate with preloading and asynchronous script loading, though some optimization opportunities exist. SEO is well addressed with proper meta tags and Open Graph data. Mobile optimization is good, and the site includes interactive elements such as video backgrounds and dynamic menus. Technical risks are minimal, but the absence of some security headers and limited accessibility features represent areas for improvement. Overall, the technical infrastructure supports the business goals effectively.
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

Earlier scans of this domain

  1. 50/100Medium35 findingsView report
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