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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

65/100

Risk levelMedium

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

Oskarta.cz is a prepaid mobile telecommunications service website operated under the Vodafone Czech Republic a. s. brand. The site offers prepaid SIM cards with competitive pricing for voice calls and SMS, emphasizing no contractual obligations and 4G LTE readiness. The business targets Czech Republic mobile users seeking affordable prepaid mobile services. The website content is professionally designed, consistent with Vodafone branding, and provides clear navigation and relevant business information. Technically, the site uses a modern but somewhat dated JavaScript stack including jQuery and Modernizr, with server-side PHP framework Nette inferred. The site is hosted and maintained by Vodafone Czech Republic infrastructure, ensuring reliable performance and mobile optimization. Security posture is good with HTTPS enforced and cookie consent mechanisms in place, though explicit security headers are not detected in the provided data. Privacy policies and cookie policies are comprehensive and GDPR compliant, reflecting strong privacy compliance. However, WHOIS data is missing, which reduces domain registration trustworthiness, though the website's association with Vodafone mitigates this concern. Overall, the site is trustworthy, secure, and professionally maintained, suitable for its business purpose.

Scanned

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

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';…

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

Keep watching oskarta.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

€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
72
Security headers
35
Email security
60
DNS health
80
Network security
100
GDPR outside view
40
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

Oskarta.cz operates as a prepaid mobile service under Vodafone Czech Republic, a large telecommunications provider. The business model focuses on prepaid SIM cards with simple pricing and no hidden fees, appealing to cost-conscious consumers. The site leverages Vodafone's brand strength and infrastructure, positioning itself competitively in the Czech telecom market. Key services include voice calls at 2 Kč/min, SMS at 1.50 Kč, and 4G LTE internet access. The company provides extensive customer support information via phone and social media. The partnership with Sazkamobil is indicated in privacy documentation, suggesting a broader ecosystem collaboration. The business benefits from Vodafone's market presence, enabling wide distribution and brand trust. Growth potential is supported by online ordering and digital engagement. The website's content and linked documents demonstrate regulatory compliance and customer transparency.

Security posture

The website demonstrates a mature security posture with mandatory HTTPS usage and a cookie consent banner aligned with GDPR requirements. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options is a gap that could be addressed to enhance protection against common web attacks. There is no visible incident response or vulnerability disclosure information, which is a best practice for transparency and security culture. The use of third-party analytics and tag management services introduces moderate tracking but appears compliant with privacy standards. Overall, the security posture is solid but could be improved by adding security headers and publishing vulnerability reporting channels.

Recommendations

  1. Implement and configure security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to strengthen web security.
  2. Publish a security.txt file or dedicated vulnerability disclosure page to facilitate responsible reporting of security issues.
  3. Enhance accessibility features to improve compliance with WCAG standards and broaden user inclusivity.
  4. Consider adding explicit contact emails for customer support and security incident reporting to improve transparency.
  5. Regularly audit third-party scripts and tracking services to ensure ongoing privacy compliance and minimize user tracking.
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 SIM cards, Voice calls at 2 Kč/min, SMS at 1.50 Kč, 4G LTE internet access
Content quality
good
Branding
consistent

Technology

Stack
jQuery 1.10.2, Modernizr 2.6.2, NetteForms, JavaScript, CSS3
Frameworks
Nette (PHP framework inferred from netteForms.js)
Platforms
Vodafone Czech Republic web infrastructure
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Adobe Omniture, Tealium
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Tealium (tags.tiqcdn.com), Adobe Omniture (omniture.com)
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 fully accessible with no blocking or WAF challenge
  2. Content is professionally presented and consistent with Vodafone branding
  3. No WHOIS data available, which is unusual for a commercial domain
  4. Cookie consent and privacy policies are present and GDPR compliant
  5. No contact emails found, only phone numbers with clear context
  6. No forms detected on the homepage content provided
  7. Use of third-party analytics and tag management services
  8. No explicit security headers detected in provided data
  9. Multiple PDF documents linked for terms, contract summary, and complaints
Technical notes

Notes

The website uses a combination of legacy and modern front-end technologies including jQuery 1.10.2 and Modernizr 2.6.2, alongside the Nette PHP framework for form handling. The site is hosted on Vodafone Czech Republic infrastructure, ensuring reliable uptime and performance. The design is responsive and mobile-optimized, with clear navigation and structured content. SEO is supported by appropriate meta tags and descriptive titles. Performance is moderate, with asynchronous loading of analytics scripts to reduce blocking. There is no detected CMS, suggesting a custom or proprietary platform. Technical risks include reliance on older JavaScript libraries which may have known vulnerabilities if not updated. Opportunities exist to modernize the tech stack and improve accessibility and security header implementation.
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. 67/100Medium28 findingsView report
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