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Security report for itesco.cz

Tesco Stores ČR a.s. · Retail · Czech Republic

Partial score · DNS & email only

68/100

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

Tesco Stores ČR a.s. operates a large retail supermarket chain in the Czech Republic, offering both physical stores and online grocery shopping services. The website provides comprehensive information about weekly offers, loyalty programs (Clubcard), and additional services such as home delivery and click & collect. The company targets general consumers in the Czech market, emphasizing convenience and savings. Technically, the website is built on modern frameworks such as Next.js and React, with good mobile optimization and accessibility features. Security posture is strong with HTTPS enforcement and standard security headers, although explicit security policies and incident response information are not publicly available. The absence of WHOIS registration data reduces domain trustworthiness slightly but does not detract from the overall legitimacy of the business presence online.

Scanned

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

NIS2 and GDPR posture

GDPR outside view
73/ 100 · Medium
Checks completed
6of 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

2 findings rated critical or high. Fix these first.

  1. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  2. 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 itesco.cz

This scan found 10 issues across 5 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
0
Email security
80
DNS health
85
Network security
100
GDPR outside view
73
Average
68

Not counted

  • Security headers: did not complete in this scan.
  • 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

Tesco Czech Republic holds a strong market position as a leading supermarket chain with a well-established brand and extensive product offerings. The business model combines brick-and-mortar retail with a growing e-commerce platform, supported by a loyalty program that drives customer retention. The company leverages partnerships for recruitment and corporate communications, maintaining a consistent brand identity. Growth indicators include active promotion of online shopping and mobile app usage. The company operates in the retail sector, focusing on groceries, household goods, and apparel. Strategic observations highlight the importance of digital transformation and customer engagement through personalized offers and convenient shopping experiences.

Security posture

The website demonstrates a mature security posture with HTTPS, security headers, and cookie consent mechanisms in place. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. However, the lack of publicly available security policies, incident response contacts, and vulnerability disclosure mechanisms indicates room for improvement in transparency and readiness. Compliance with GDPR is evident through privacy policies and cookie management. The security culture appears focused on protecting user data and maintaining trust but could benefit from enhanced communication of security practices and incident handling procedures.

Recommendations

  1. Publish a dedicated security policy and incident response plan on the website to improve transparency and user trust.
  2. Implement and publicize a vulnerability disclosure program, including a security.txt file, to encourage responsible reporting of security issues.
  3. Enhance contact information with dedicated security and abuse email addresses to facilitate incident reporting and response.
  4. Regularly audit and update third-party scripts and dependencies to mitigate potential vulnerabilities.
  5. Continue investing in digital security awareness and training to strengthen the overall security culture.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Tesco Stores ČR a.s.
Description
Prolistujte si aktuální letáky Tesco, získejte skvělé slevy s Clubcard, objevte chutné recepty anebo vyřiďte svůj nákup online hned teď. Těšíme se na vás!
Key services
Online grocery shopping, Clubcard loyalty program, Weekly flyers and special offers, Home delivery and click & collect services
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Google Tag Manager, New Relic, CSS-in-JS (styled-components or similar)
Frameworks
Next.js
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with opt-in/out
  • No exposed sensitive data in HTML
  • Secure forms with CSRF protection implied

Analytics and tracking

Services
Google Analytics, New Relic
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
New Relic
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. WHOIS data is unavailable, which is unusual for a corporate domain but may be due to CZ NIC policies or privacy.
  3. Strong branding and consistent corporate identity throughout the site.
  4. Comprehensive privacy and cookie policies with user consent mechanisms.
  5. No direct company contact emails or phone numbers found in the visible content; contact is via forms and corporate pages.
  6. Use of modern web technologies and analytics tools.
  7. No security.txt or explicit vulnerability disclosure policy found.
  8. No explicit security or incident response policies publicly available.
Technical notes

Notes

The website is built using modern web technologies including React and Next.js, enabling server-side rendering and improved performance. It employs CSS-in-JS styling and integrates analytics tools such as Google Analytics and New Relic for monitoring. The site is mobile-optimized with responsive design and accessibility features like skip links and ARIA roles. Performance is moderate, with room for optimization in loading times. The absence of a detected CMS suggests a custom or proprietary platform. Hosting provider details are not explicitly available. Technical risks include reliance on multiple third-party scripts which require ongoing security management to prevent supply chain attacks.
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. 68/100Medium19 findings · partial scanView report
  2. 58/100Medium13 findings · partial scanView report
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