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Security report for oskarta.cz

Vodafone Czech Republic a. s. · Telecommunications · Czech Republic

Medium risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

67/100

Risk levelMedium

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

Oskarta.cz is a Czech Republic-based prepaid mobile telecommunications service brand operated under Vodafone Czech Republic a. s. The website primarily serves as an informational and redirect portal, informing users that Oskarta prepaid services are now available through Vodafone's main website. The business targets prepaid mobile users seeking affordable calling and SMS options without contractual obligations. The site provides essential service information, pricing, and links to terms, privacy, and cookie policies, reflecting a professional and user-focused approach. Technically, the website employs established JavaScript libraries such as jQuery and Modernizr, and integrates enterprise-grade analytics tools like Adobe Omniture and Tealium, indicating a mature digital infrastructure. Hosting and domain management appear to be under Vodafone's control, although WHOIS data is unavailable, possibly due to privacy protection or domain status issues. Security posture is generally good with enforced HTTPS and cookie consent mechanisms; however, explicit security headers and incident response information are absent, representing areas for improvement. Overall, the website is trustworthy and professionally maintained, but the lack of WHOIS transparency and some security best practices slightly reduce its trust score.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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

6 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

      Third-party services without privacy policy

      Detected services: Facebook

      What to do: Document all third-party data sharing in your privacy policy

  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 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';…

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Keep watching oskarta.cz

This scan found 20 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
35
Email security
70
DNS health
85
Network security
100
GDPR outside view
40
Average
67

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

Oskarta operates as a prepaid mobile service brand within the telecommunications sector in the Czech Republic, positioned as a cost-effective alternative for mobile calls and SMS. Its business model focuses on prepaid usage without binding contracts, appealing to budget-conscious consumers. The brand is integrated within Vodafone Czech Republic's ecosystem, leveraging its infrastructure and market presence. The website's linkage to Vodafone domains and policies confirms this relationship. The absence of direct contact emails but presence of service phone numbers and social media presence on Facebook suggests a customer support model relying on self-service portals and social engagement. The use of enterprise analytics and marketing tools indicates a data-driven approach to customer engagement and service optimization. The brand's market position is likely that of a niche prepaid offering under a major telecom operator, benefiting from Vodafone's scale and reputation.

Security posture

The website demonstrates a baseline security posture with mandatory HTTPS and a GDPR-compliant cookie consent banner. The integration of third-party analytics is managed with user consent mechanisms, reflecting privacy awareness. However, the absence of explicit security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces defense-in-depth. No forms are present on the main page, minimizing attack surface, but the lack of published incident response contacts or vulnerability disclosure policies limits transparency and preparedness communication. The missing WHOIS data raises minor concerns about domain registration transparency, though the strong Vodafone branding mitigates suspicion. Overall, the security posture is adequate for an informational site but could be enhanced by adopting additional HTTP security headers and publishing security policies.

Recommendations

  1. Implement and enforce security headers including CSP, HSTS, and X-Frame-Options to strengthen site security.
  2. Publish a security.txt file or dedicated vulnerability disclosure page to improve transparency and incident response readiness.
  3. Provide explicit incident response contact information to facilitate security communications.
  4. Enhance WHOIS transparency if possible to improve domain trustworthiness and legitimacy perception.
  5. Continue maintaining GDPR compliance and improve accessibility features to broaden user inclusivity.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Vodafone Czech Republic a. s.
Description
Předplacená Oskarta: Volání za 2 Kč a SMS za 1,50 Kč do všech sítí. Bez závazků a s doručením zdarma. Objednejte pohodlně online.
Key services
Prepaid mobile calls, SMS services, Online ordering
Content quality
good
Branding
consistent

Technology

Stack
jQuery 1.10.2, Modernizr 2.6.2, NetteForms, JavaScript, CSS3
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner implemented

Analytics and tracking

Services
Adobe Omniture, Tealium
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Tealium (utag.js), Adobe Omniture (s_code.js)
Marketing tools
Tealium, Adobe Omniture
Transparency
good

Site quality

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

Key observations

  1. Website is a redirect/announcement page indicating Oskarta prepaid service is now offered via Vodafone website.
  2. WHOIS data unavailable, possibly due to privacy or domain status issues.
  3. Website uses modern JavaScript libraries and tracking tools consistent with enterprise telecom websites.
  4. Cookie consent and privacy policies are clearly linked and GDPR compliant.
  5. No contact emails found; phone numbers provided only for service self-care and support.
  6. No forms present on the main page; user self-care portal is external.
  7. No explicit security headers detected in HTML content; SSL is enforced.
  8. Social media presence limited to Facebook link.
  9. No vulnerability disclosure or incident response information found.
Technical notes

Notes

The website uses a traditional web stack with jQuery 1.10.2 and Modernizr 2.6.2, indicating some legacy components but still functional for broad compatibility. The presence of NetteForms suggests server-side form handling capabilities, though no forms are present on the main page. Analytics integration via Tealium and Adobe Omniture reflects enterprise-level tracking and marketing capabilities. Hosting and domain references point to Vodafone Czech Republic infrastructure. Performance is moderate with asynchronous loading of scripts and responsive design elements. Mobile optimization is good, with viewport meta tags and responsive CSS. SEO is supported by meta keywords, description, and structured navigation. Accessibility is basic but could be improved with ARIA roles and enhanced keyboard navigation. Overall, the technical implementation is solid but could benefit from modernization and enhanced security practices.
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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