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Security report for blesk.cz

Czech News Center · Media · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

65/100

Risk levelMedium

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

Blesk.cz is a leading Czech news portal operated by Czech News Center, offering a wide range of content including news, celebrity gossip, sports, entertainment, and weather forecasts. The site targets a broad general audience in the Czech Republic and operates on an advertising-supported business model with premium subscription options. Technically, the website employs a modern tech stack including jQuery, Google Tag Manager, and multiple third-party analytics and advertising services, ensuring a robust digital presence with good mobile optimization and SEO practices. Security-wise, the site enforces HTTPS, uses a consent management platform for GDPR compliance, and integrates reputable ad and analytics networks, although additional security headers could enhance protection. Overall, the website demonstrates a mature digital infrastructure with strong business credibility and compliance posture.

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

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

    • 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

    • 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

  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"

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

Keep watching blesk.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

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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
55
Email security
75
DNS health
75
Network security
100
GDPR outside view
25
Average
65

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

Blesk.cz holds a strong market position as a major Czech news outlet under Czech News Center. Its competitive advantage lies in its broad content offering and integration with multiple media properties and partner sites. Revenue streams primarily come from advertising and premium subscriptions managed via partners like ikiosek.cz. The target customer segment is the general Czech population interested in news and entertainment. Growth indicators include extensive use of modern marketing and analytics tools and a comprehensive consent management system. The partnership ecosystem includes multiple related media domains and payment processors, reflecting a well-integrated media group operation.

Security posture

The website exhibits a solid security posture with enforced HTTPS and GDPR-compliant consent management via Didomi. Use of reputable third-party analytics and ad services reduces risk exposure. However, the absence of some security headers like Content-Security-Policy and X-Frame-Options suggests room for improvement. No vulnerabilities or exposed sensitive data were detected in the analyzed content. Incident response and security policy information are not publicly disclosed, which is common for media sites but could be enhanced for transparency. Overall, the site maintains good security hygiene appropriate for its business type.

Recommendations

  1. Implement additional HTTP security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to enhance protection against common web attacks.
  2. Publish a clear security policy and incident response contact information to improve transparency and trust.
  3. Conduct regular audits of third-party scripts and dependencies to mitigate risks from external libraries.
  4. Enhance accessibility features to meet higher compliance standards and improve user experience for all users.
  5. Consider publishing a vulnerability disclosure or security.txt file to facilitate responsible reporting of security issues.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Czech News Center
Description
Blesk is a Czech news portal providing news about celebrities, events, sports, advice, and weather forecasts.
Key services
News articles, Celebrity news, Sports news, Weather forecasts, Entertainment content
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Google Tag Manager, Didomi Consent SDK, Gemius Analytics, Piano Paywall, Marfeel SDK, Recombee API Client, Rubicon Project Prebid, Google Publisher Tags, CNC Ads Wrapper
Platforms
Desktop, Mobile
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Consent management platform (Didomi) implemented
  • No exposed sensitive data detected
  • Use of reputable analytics and ad services

Analytics and tracking

Services
Gemius, Google Analytics, Recombee, OnThe.io
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google Ad Manager, Rubicon Project, Adform, DoubleClick, CPEX
Tracking pixels
Gemius, Didomi, Piano, Marfeel, Recombee, OnThe.io
Marketing tools
Didomi Consent SDK, Piano Paywall
Transparency
good

Site quality

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

Key observations

  1. Website is a major Czech news portal with extensive content and advertising.
  2. Uses multiple third-party analytics and advertising technologies.
  3. Implements GDPR-compliant consent management via Didomi.
  4. No WHOIS data publicly available, likely due to registry policy or privacy protection.
  5. No contact emails or phone numbers explicitly found in the HTML content provided.
  6. No security.txt or explicit vulnerability disclosure found.
  7. No explicit terms of service page detected in the content.
  8. Website uses HTTPS with good SSL configuration.
  9. No WAF or blocking mechanisms detected.
Technical notes

Notes

The website uses a combination of legacy and modern JavaScript libraries, including jQuery and module-based SDKs. It leverages multiple third-party services for analytics, advertising, consent management, and paywall functionality. Static assets are served via CDN77, indicating a distributed hosting approach. Performance is moderate with room for optimization, especially in script loading and resource management. SEO is well addressed with comprehensive meta tags and Open Graph data. Mobile optimization is good, supported by responsive design and adaptive navigation. The site does not appear to use a common CMS or framework explicitly but is likely custom-built or heavily customized. Technical risks include dependency on multiple third-party scripts which require ongoing management.
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. 65/100Medium30 findingsView report
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