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Security report for cpex.cz

Czech Publisher Exchange · Media · Czech Republic

High risk. 8 critical or high findings in GDPR outside view, SSL/TLS and 1 other check.

Security score

37/100

Risk levelHigh

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

Czech Publisher Exchange (CPEx) is an association of leading Czech online media operators providing access to advertising spaces via Real Time Bidding (RTB) technology. The website presents a professional and modern digital presence built on WordPress with the Divi theme, incorporating structured data and social media metadata to enhance SEO and sharing capabilities. The technical infrastructure includes integration with Google Tag Manager, Cxense advertising technology, and Amazon Cloudfront CDN, indicating a mature digital setup. Security posture is strong with HTTPS and security headers implemented, though privacy compliance and explicit policies are lacking. The absence of WHOIS data and registrant information introduces some uncertainty regarding domain legitimacy. Overall, the site is business-focused, safe, and targets advertisers and media operators in the Czech Republic.

Scanned

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

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

8 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

  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.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  3. 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 23 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

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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
0
Security headers
20
Email security
55
DNS health
80
Network security
40
GDPR outside view
25
Average
37

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, leveraging RTB technology to connect advertisers with premium Czech online media inventory. The business model centers on facilitating automated ad buying and selling, targeting advertisers seeking Czech market reach and media operators looking to monetize inventory efficiently. The website content and metadata emphasize the association's leadership and collaboration among Czech publishers, positioning CPEx as a key player in the local digital advertising ecosystem. The use of advanced advertising and analytics tools suggests a data-driven approach to market engagement. However, limited public business details and lack of contact information restrict deeper insights into company size, revenue, or partnerships.

Security posture

The website demonstrates a solid security foundation with enforced HTTPS, presence of multiple security headers (HSTS, CSP, X-Frame-Options, etc.), and no visible exposure of sensitive data. Advertising and analytics scripts are present but do not appear to introduce vulnerabilities. The lack of published security policies, incident response contacts, or vulnerability disclosure mechanisms indicates room for improvement in security governance and transparency. Privacy compliance is minimal, with no clear cookie consent or GDPR-related disclosures, which could pose regulatory risks. Overall, the security posture is technically sound but lacks comprehensive policy and compliance documentation.

Recommendations

  1. Publish clear and comprehensive privacy and cookie policies with user consent mechanisms to enhance GDPR compliance.
  2. Provide explicit contact information including business emails and phone numbers to improve business credibility and user trust.
  3. Develop and publish security policies and incident response procedures to demonstrate security maturity and readiness.
  4. Implement a vulnerability disclosure program and security.txt file to encourage responsible reporting and transparency.
  5. Enhance website accessibility features to improve inclusivity and compliance with accessibility standards.
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
Real Time Bidding (RTB) advertising space access
Content quality
good
Branding
consistent

Technology

Stack
WordPress, Divi Theme, Google Tag Manager, Cxense, Cloudfront, 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 security headers
  • No exposed sensitive data in HTML

Analytics and tracking

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

Advertising

Ad networks
Cxense
Marketing tools
Privacy Center SDK
Transparency
basic

Site quality

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

Key observations

  1. Website is accessible with no blocking or WAF challenge.
  2. WHOIS data is missing or domain may not be properly registered.
  3. Website uses modern WordPress CMS with Divi theme.
  4. Good use of structured data and metadata for SEO and social sharing.
  5. No explicit privacy, cookie, or terms of service pages found.
  6. No contact emails or phone numbers clearly identified in content.
  7. Security headers and HTTPS are properly implemented.
  8. Advertising and analytics scripts present but privacy compliance is minimal.
  9. Content is business-focused and safe for general audiences.
Technical notes

Notes

The website is built on WordPress CMS using the Divi theme, a popular and flexible framework. It integrates third-party services such as Google Tag Manager for analytics and Cxense for advertising technology, supported by Amazon Cloudfront CDN for content delivery. The site is mobile responsive with good SEO metadata and structured data implementation. Performance is moderate, with potential optimization opportunities in loading speed and accessibility. The technical stack is modern and well-maintained, but the absence of explicit privacy and security policy pages suggests some technical debt in compliance and governance aspects.
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. 43/100High36 findingsView report
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