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Security report for tendry.cz

Datlab s.r.o. · Government · Czech Republic

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

59/100

Risk levelMedium

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

Datlab s.r.o. operates the website Tendry.cz, a specialized platform providing daily public procurement opportunities for businesses in the Czech Republic. The company leverages data acquisition and analysis expertise to aggregate over 25,000 sources of public contract data, offering AI-driven smart monitoring and email alerts to its users. Positioned as a niche leader in the Czech public procurement sector, Tendry.cz targets companies across multiple industries including construction, transportation, and office supplies. Technically, the website employs modern frontend technologies such as Vue.js and Bootstrap, hosted by Wedos, a reputable Czech hosting provider. The site is mobile-optimized and features a professional design with clear navigation. However, some technical improvements are recommended, including enhanced accessibility and SEO optimizations. From a security perspective, the site uses HTTPS and defers script loading for performance but lacks explicit security headers and published security policies. No critical vulnerabilities or suspicious content were detected. Privacy compliance is limited due to the absence of privacy and cookie policies, which should be addressed to meet GDPR requirements. Overall, Tendry.cz presents a trustworthy and professional online presence with a solid business model and technical foundation. Strategic improvements in privacy compliance and security posture will enhance user trust and regulatory adherence.

Scanned

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

9 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

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

  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 tendry.cz

This scan found 26 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

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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
40
Email security
50
DNS health
80
Network security
100
GDPR outside view
10
Average
59

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 tendry.cz, from OffSeq Breach.

Total records
43
Employees
0
Customers
43
Third parties
0
Weak passwords
2%

1 subdomain 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 tendry.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

Datlab s.r.o. holds a strong position in the Czech public procurement data market, offering a subscription-based service that aggregates comprehensive tender data and provides AI-powered monitoring. Its competitive advantage lies in the breadth of data sources and the integration of smart alerting mechanisms. Revenue streams likely include subscription fees for access to premium data and monitoring features. The target customers are businesses seeking to identify and bid on public contracts efficiently. The company maintains a partnership ecosystem with related Datlab services and a sister nonprofit organization, EconLab, which supports public benefit projects. Growth indicators include a long-established domain and consistent branding. The business model emphasizes data quality and user convenience, positioning Tendry.cz as a critical tool for procurement professionals in the Czech Republic.

Security posture

The current security maturity level of Tendry.cz is moderate. The website enforces HTTPS, which is mandatory for secure communications. However, the absence of key security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces protection against common web attacks. No explicit incident response or vulnerability disclosure policies are published, which limits transparency and preparedness. Data protection practices are not fully documented, and GDPR compliance indicators are weak due to missing privacy and cookie policies. The site does not expose sensitive data or show signs of vulnerable libraries. Overall, while no critical security flaws are evident, enhancements in security headers, policy transparency, and compliance documentation are recommended to strengthen the security posture and build user trust.

Recommendations

  1. Implement and publicly disclose a comprehensive privacy policy and cookie policy to ensure GDPR compliance.
  2. Add security headers such as CSP, HSTS, and X-Frame-Options to enhance protection against web vulnerabilities.
  3. Publish a vulnerability disclosure policy and incident response contact information to improve transparency and security readiness.
  4. Improve website accessibility features to comply with standards and enhance user experience for all visitors.
  5. Regularly audit and update third-party scripts and tracking mechanisms to minimize security risks and privacy concerns.

Contact details published on the site

Addresses
Legal name
Datlab s.r.o.
VAT number
CZ24213101
Registration number
C 189197
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Datlab s.r.o.
Description
Datlab is a Czech company specializing in data acquisition, processing, and analysis, primarily focusing on economic data and the public procurement sector. The website Tendry.cz offers daily public contract opportunities for companies across various industries.
Key services
Public contract search, Daily email alerts, AI-based smart monitoring, Comprehensive public procurement data aggregation
Content quality
good
Branding
consistent

Technology

Stack
Bootstrap CSS, JavaScript, Custom CSS and JS, Manifest and favicon for PWA
Frameworks
Bootstrap, Vue.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
65/100
Good practices seen
  • HTTPS usage implied by URL
  • Defer attribute on script for performance

Analytics and tracking

Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
pl.datlab.eu
Marketing tools
pl.datlab.eu tracking script
Transparency
basic

Site quality

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

Key observations

  1. Website provides a specialized service for public procurement data in Czech Republic.
  2. No explicit privacy or cookie policies found, which is a compliance gap.
  3. Contact information is clearly provided with company address and email.
  4. No phone numbers explicitly labeled as company contact found.
  5. No security policy or incident response information is published.
  6. Use of modern frontend technologies (Vue.js, Bootstrap).
  7. No CMS detected; likely custom-built frontend.
  8. External links mostly to related Datlab services and social media.
  9. Tracking script from pl.datlab.eu indicates proprietary analytics.
  10. No signs of suspicious or malicious content.
Technical notes

Notes

The website is built using modern frontend technologies including Vue.js and Bootstrap, indicating a contemporary and maintainable codebase. Hosting is provided by Wedos, a reputable Czech hosting provider, which supports domain legitimacy. Performance is moderate with deferred script loading improving page load times. The site is mobile-optimized and features responsive design elements. However, SEO and accessibility could be improved by adding more semantic HTML elements and ARIA attributes. No CMS was detected, suggesting a custom or framework-based solution. The use of a proprietary tracking script indicates in-house analytics capabilities. Technical risks are low but could be mitigated further by implementing security headers and improving privacy compliance.
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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