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Security report for tmobile.cz

T-Mobile · Telecommunications · Czech Republic

Low risk. 1 critical or high finding in GDPR outside view.

Security score

85/100

Risk levelLow

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

T-Mobile Czech Republic operates a comprehensive telecommunications website offering mobile and fixed services including tariffs, mobile data, home internet, and digital TV. The site targets general consumers in the Czech Republic and positions itself as a leading operator in the market. Technically, the website uses modern frameworks such as React and Liferay Portal, integrates analytics and marketing tools like Google Tag Manager and Exponea, and maintains good performance and mobile optimization. Security posture is solid with HTTPS enforcement and cookie consent mechanisms, though explicit security policies and incident response contacts are not found. The absence of WHOIS data is a notable gap but does not detract significantly from the overall legitimacy given the professional branding and content. Strategic recommendations include adding explicit security and incident response information, enhancing accessibility, and implementing security.txt for vulnerability disclosure.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 100 · Low
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

1 finding 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.

    • 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

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

Keep watching tmobile.cz

This scan found 13 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
90
Security headers
75
Email security
85
DNS health
75
Network security
100
GDPR outside view
85
Average
85

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

The website reflects a large telecommunications entity with a broad service portfolio targeting residential customers. The business model focuses on bundled offerings for mobile and fixed services under the Magenta 1 brand. Market positioning is strong with consistent branding and comprehensive service descriptions. The use of advanced analytics and marketing tools indicates a mature digital marketing strategy. No direct partner or subsidiary domains were identified from the website content. The lack of WHOIS data limits verification of corporate registration details but the site’s content and branding align with a reputable operator.

Security posture

The website demonstrates a good security baseline with HTTPS, security headers, and cookie consent compliance. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of a published security policy, incident response contacts, or vulnerability disclosure program suggests room for improvement in transparency and readiness. The site does not appear to be behind a WAF or security challenge, indicating open accessibility. Recommendations include publishing security policies, incident response contacts, and adopting security.txt to improve trust and compliance.

Recommendations

  1. Publish a clear security policy and incident response contact information on the website.
  2. Implement a security.txt file to facilitate vulnerability disclosure and improve transparency.
  3. Enhance accessibility features to meet higher standards for all users.
  4. Add Content Security Policy (CSP) headers to strengthen protection against XSS and other attacks.
  5. Regularly audit third-party scripts and libraries to ensure no vulnerabilities are introduced.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
T-Mobile
Description
U nás pořídíte tarifní řešení pro celou domácnost - neomezené volání, mobilní data, domácí internet i digitální TV. Výhodně v Magentě 1.
Key services
mobile tariffs, mobile data, home internet, digital TV
Content quality
good
Branding
consistent

Technology

Stack
React, YUI, Liferay, Google Tag Manager, jQuery
Frameworks
Liferay Portal
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics (via GTM), Exponea
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
AppNexus (secure.adnxs.com)
Tracking pixels
Exponea
Marketing tools
Exponea
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and well-branded for T-Mobile Czech Republic.
  2. Content is comprehensive and targeted at consumers for mobile and fixed telecom services.
  3. No WHOIS data available, which is unusual for a major operator domain.
  4. Strong privacy and cookie compliance observed.
  5. Use of modern web technologies and analytics tools.
  6. No security blocking or WAF detected.
  7. No explicit security policy or incident response contact found on site.
  8. No vulnerability disclosure or security.txt found.
Technical notes

Notes

The website is built on the Liferay Portal CMS with React and YUI JavaScript frameworks. It integrates Google Tag Manager and Exponea for analytics and marketing automation. The site uses modern web standards and is mobile optimized with responsive design. Performance is moderate with combined and minified resources. Accessibility is basic but could be improved. SEO is supported with proper meta tags and Open Graph data. No hosting provider details were identified from the HTML content. The site uses HTTPS with good SSL configuration. Overall, the technical infrastructure supports a professional and scalable web presence.
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

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