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Security report for cpex.cz

Czech Publisher Exchange · Media · Czech Republic

High risk. 10 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

43/100

Risk levelHigh

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

Czech Publisher Exchange (CPEx) is a consortium of leading Czech online media operators providing advertising inventory through Real-Time Bidding (RTB) technology. The website positions itself as a key player in the Czech digital advertising market, targeting advertisers and media buyers seeking programmatic advertising solutions. The business model revolves around aggregating advertising spaces and facilitating efficient ad placements via RTB. The site is professionally designed, mobile-optimized, and uses modern web technologies including WordPress with the Divi theme, Google Tag Manager, and Cxense for advertising and analytics. Security posture is solid with HTTPS enforced and privacy compliance evident through cookie and privacy policies. However, the absence of WHOIS registration data and lack of explicit incident response or security policies publicly available slightly reduce trustworthiness. Overall, the site is credible and functional but would benefit from enhanced transparency in domain registration and security disclosures.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 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

10 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 cpex.cz

This scan found 28 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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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
42
Security headers
20
Email security
70
DNS health
80
Network security
20
GDPR outside view
25
Average
43

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 cpex.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for cpex.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

CPEx operates in the media sector as a programmatic advertising exchange platform in the Czech Republic. Its competitive advantage lies in aggregating premium Czech online media advertising inventory and providing access via RTB technology. The target customers are advertisers and agencies seeking efficient digital ad placements. The business model likely generates revenue through commissions or fees on ad transactions. The website content and structured data indicate a medium-sized entity with consistent branding and good content quality. Partnerships with technology providers like Cxense and Google Tag Manager suggest a mature marketing ecosystem. No parent or subsidiary companies are identified. The company maintains a professional online presence but lacks publicly disclosed contact details and certifications.

Security posture

The website demonstrates a good security baseline with HTTPS enabled and use of security-related HTTP headers assumed. Privacy compliance is supported by cookie consent mechanisms and privacy policies aligned with GDPR. No direct vulnerabilities or exposed sensitive data were detected in the HTML content. However, the lack of a published security policy, incident response plan, or security.txt file limits transparency and preparedness visibility. The use of third-party scripts requires ongoing monitoring to mitigate supply chain risks. Overall, the security posture is adequate for the business type but could be improved by publishing explicit security and incident response information and implementing advanced headers like Content Security Policy.

Recommendations

  1. Publish a security policy and incident response plan on the website to improve transparency and preparedness.
  2. Implement and publicly link a security.txt file to facilitate vulnerability reporting.
  3. Verify and update WHOIS domain registration information to enhance domain legitimacy and trust.
  4. Add clear company contact emails and phone numbers to improve business credibility and user trust.
  5. Enhance accessibility features to improve compliance and user experience for all visitors.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Czech Publisher Exchange
Description
Czech Publisher Exchange (CPEx) je sdružení předních českých provozovatelů online médií. Zpřístupňujeme reklamní plochy pomocí RTB technologie.
Key services
RTB advertising space access, Advertising inventory exchange
Content quality
good
Branding
consistent

Technology

Stack
WordPress, Divi Theme, Google Tag Manager, Cxense, Cloudfront CDN, Privacy Center SDK
Frameworks
Divi (WordPress theme framework)
Platforms
WordPress CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Use of privacy SDK
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager, Cxense
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Cxense
Tracking pixels
Cxense
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. Professional and consistent branding with clear business focus
  3. Use of modern web technologies and tracking tools
  4. No direct contact emails or phone numbers found in HTML content
  5. WHOIS data unavailable, which is a concern for domain legitimacy
  6. Privacy and cookie policies present and appear GDPR compliant
  7. No explicit security or incident response policies publicly visible
Technical notes

Notes

The website is built on WordPress using the Divi theme framework, leveraging modern web fonts and CDN services for performance. It integrates Google Tag Manager and Cxense for analytics and advertising, indicating a mature digital marketing infrastructure. The site is mobile-optimized with responsive design and good SEO metadata including Open Graph and JSON-LD structured data. Performance is moderate, with potential for improvement by optimizing third-party scripts and caching strategies. Accessibility is basic and could be enhanced. No critical technical debt or outdated libraries were detected in the provided HTML content.
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. 37/100High31 findingsView report
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