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Security report for sklik.cz

Seznam.cz, a.s. · Technology · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view and Security headers.

Security score

62/100

Risk levelMedium

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

Sklik.cz is a Czech Republic-based pay-per-click advertising platform operated by Seznam.cz, a.s., a major internet company in the region. The platform enables businesses to advertise on Seznam.cz's search engine and content network, targeting customers effectively with regional and demographic filters. The website presents a professional and clear business model focused on online advertising services with a strong market position in the Czech digital advertising space. Technically, the site uses standard web technologies including JavaScript and CSS, with a responsive design and basic accessibility features. Security-wise, the site uses HTTPS and includes consent management platform scripts but lacks visible advanced security headers and explicit privacy or security policies on the main page. WHOIS data is unavailable, which limits domain registration trust analysis, but the branding and linked domains strongly associate the site with the reputable Seznam.cz company. Overall, the site is professional and trustworthy but could improve transparency around privacy and security policies.

Scanned

This is an earlier scan of sklik.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

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

  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 sklik.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.

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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
85
Security headers
15
Email security
85
DNS health
75
Network security
100
GDPR outside view
10
Average
62

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 sklik.cz, from OffSeq Breach.

Total records
177
Employees
0
Customers
177
Third parties
0
Weak passwords
25%

3 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for sklik.cz.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

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Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Sklik.cz operates as a key advertising service within the Seznam.cz ecosystem, targeting businesses seeking to reach Czech internet users via PPC ads. Its competitive advantage lies in integration with the leading Czech search engine and content network, offering precise targeting and performance analytics. The business model is based on pay-per-click payments, allowing advertisers to control budgets and measure ROI. The platform supports regional targeting and professional ad management services, appealing to both local and national advertisers. Partnerships with certified agencies and a partner program enhance its ecosystem. The company benefits from Seznam.cz's strong brand recognition and market presence in the Czech Republic. Growth potential is tied to the expansion of digital advertising in the region and increasing online user engagement.

Security posture

The website demonstrates a moderate security posture with HTTPS enabled and inclusion of CMP scripts for cookie consent management, indicating awareness of privacy compliance. However, the absence of explicit security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces the overall security robustness. No direct contact information for security incidents or vulnerability disclosure policies are present, which could hinder incident response effectiveness. The lack of WHOIS data transparency is a concern but may be due to registry policies. No vulnerabilities or exposed sensitive data were detected in the provided content. To enhance security posture, the site should implement comprehensive security headers, publish clear privacy and security policies, and provide dedicated security contact channels.

Recommendations

  1. Implement and publish a comprehensive privacy policy and cookie policy accessible from the main site.
  2. Add standard security headers including Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options.
  3. Provide clear contact information for security incidents and establish a vulnerability disclosure program.
  4. Improve accessibility features to meet higher standards and enhance user experience for all users.
  5. Verify and publish WHOIS domain registration data or provide transparency about domain registration to improve trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Seznam.cz, a.s.
Description
Sklik.cz is a PPC advertising platform that enables businesses to gain new customers by displaying ads on Seznam.cz search engine, content network, and other popular Czech websites.
Key services
PPC advertising, Targeted regional advertising, Advertising performance statistics, Professional ad management services
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, CSS, HTML5
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • Use of HTTPS (implied by URL)
  • CMP (Consent Management Platform) scripts included

Analytics and tracking

Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Sklik
Tracking pixels
Sklik tracking via h.seznam.cz scripts
Marketing tools
Sklik PPC platform
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 detected.
  2. WHOIS data is unavailable, limiting domain registration trust analysis.
  3. Website content is professional and focused on PPC advertising services.
  4. No explicit privacy or cookie policies found on main page, but terms of service are linked.
  5. No direct contact emails or phone numbers found on the main page.
  6. CMP scripts indicate some level of cookie consent management.
  7. External links mostly point to official Seznam.cz related domains.
  8. No social media links detected in the provided HTML.
  9. No forms detected on the main page except login link directing to /login.
  10. No security headers information available from provided data.
Technical notes

Notes

The website uses a straightforward technical stack with HTML5, CSS, and JavaScript. It includes external scripts from Seznam.cz domains and a CDN for URL search params polyfill. The site is mobile responsive and includes a consent management platform for cookie handling. No CMS or advanced frameworks were detected. Performance appears moderate with no obvious blocking scripts or heavy resources. SEO is supported by proper meta tags and structured navigation. Accessibility is basic but could be improved. Hosting provider and SSL certificate details are not available from the provided data. Overall, the technical implementation is solid but could benefit from modernization and enhanced security configurations.
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. 61/100Medium32 findingsView report
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