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Security report for dentsu.cz

Dentsu Česká republika · Media · Czech Republic

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

57/100

Risk levelMedium

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

Dentsu Česká republika is a well-established marketing and media agency operating as part of the global Dentsu Group. The company focuses on delivering meaningful progress for brands through integrated teams and tailored marketing solutions. Their website reflects a professional and consistent brand image aligned with the parent company. Technically, the site uses modern JavaScript frameworks such as Vue.js and Nuxt.js, ensuring a good user experience and mobile optimization. However, the site lacks visible privacy and cookie policies, security headers, and incident response information, which are important for compliance and trust. Overall, the security posture is moderate but could be improved with better policy disclosures and security best practices.

Scanned

This is an earlier scan of dentsu.cz. View the latest report

NIS2 and GDPR posture

GDPR outside view
10/ 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

9 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 dentsu.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.

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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
72
Security headers
15
Email security
70
DNS health
75
Network security
100
GDPR outside view
10
Average
57

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 dentsu.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for dentsu.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 company holds a strong market position as part of the Dentsu Group, targeting brands and businesses in the Czech Republic seeking media and marketing services. Their business model revolves around integrated marketing communications, media planning, and brand consulting. The website links to multiple global and regional Dentsu sites, indicating a broad partnership ecosystem and global reach. The absence of direct contact emails or phone numbers on the main page suggests a preference for contact via forms or dedicated contact pages. The company appears to be large and established, founded in 2014, with consistent branding and professional content.

Security posture

The website currently lacks several key security features such as security headers (CSP, X-Frame-Options), visible HTTPS enforcement details, and published security or incident response policies. No vulnerabilities or exposed sensitive data were detected in the provided content, but the absence of security best practices and contact channels for security incidents is a gap. GDPR compliance indicators such as privacy and cookie policies are missing or not easily discoverable, which could pose compliance risks. The security score is moderate, reflecting a need for improvements in transparency and technical security controls.

Recommendations

  1. Publish comprehensive privacy and cookie policies with clear GDPR compliance statements and consent mechanisms.
  2. Implement and configure security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Add visible incident response and security contact information (e.g., security@ or abuse@ emails).
  4. Ensure HTTPS is fully enforced with strong SSL/TLS configuration and display security badges if applicable.
  5. Conduct regular security audits and vulnerability scans to maintain a strong security posture.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Dentsu Česká republika
Description
Dentsu Česká republika collaborates with brands to achieve meaningful progress, offering unique growth, change, and sustainable value opportunities through One Dentsu teams tailored to client needs.
Key services
media planning, advertising, marketing strategy, brand consulting
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Vue.js, Nuxt.js, Typekit fonts
Frameworks
Vue.js, Nuxt.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
50/100

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is primarily in Czech with some English elements for global navigation.
  3. No explicit privacy, cookie, or terms of service policies found on the main page or navigation.
  4. Contact information is available via a contact page but no direct emails or phone numbers found in the HTML snippet.
  5. Website uses modern JavaScript frameworks (Vue.js, Nuxt.js) and Typekit fonts.
  6. Multiple global Dentsu Group regional sites linked, indicating a strong global presence.
  7. No visible security headers or explicit security policies found in the HTML content.
  8. No analytics or tracking scripts explicitly identified in the provided HTML snippet.
  9. No forms detected in the provided HTML snippet except navigation and menu controls.
  10. No social media links explicitly found in the snippet, but SVG icons for social platforms are present.
Technical notes

Notes

The website is built on modern JavaScript frameworks Vue.js and Nuxt.js, leveraging Typekit fonts for typography. The site shows good mobile optimization and a professional design. However, no CMS or hosting provider details were found. Performance is moderate, with preloading of scripts and styles evident. Accessibility features are basic, with skip links and ARIA labels present. SEO optimization is basic, with meta tags and Open Graph tags included but no structured JSON-LD data detected. No analytics or tracking scripts were identified in the provided snippet, suggesting minimal user tracking.
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. 57/100Medium32 findingsView report
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