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Security report for tenderarena.cz

Tender systems s.r.o. · Government · Czech Republic

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

54/100

Risk levelMedium

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

Tender arena is a Czech Republic-based certified electronic tool designed for public procurement and e-auctions, primarily serving contracting authorities and suppliers. The platform facilitates the announcement of tenders and submission of bids, positioning itself as a specialized government sector service. The business is operated by Tender systems s.r.o., established in 2013, indicating a mature presence in the public procurement technology market. Technically, the website is built using Angular 8.2.14 and integrates Google Analytics for user tracking. Hosting is provided by Websupport, a Czech hosting provider, consistent with the domain's nameservers. The site demonstrates good mobile optimization and SEO practices but lacks some accessibility features. Performance is moderate, with modern frameworks employed. From a security perspective, the site uses HTTPS with excellent SSL configuration but lacks visible security headers such as Content-Security-Policy or X-Frame-Options. No sensitive data exposure or vulnerable libraries were detected. However, the absence of privacy and cookie policies, as well as contact information for security incidents, represents compliance and transparency gaps. Overall, the website is professional and trustworthy within its niche but would benefit from enhanced privacy compliance and security best practices. There are no indications of malicious content or blocking mechanisms, making it accessible and functional for its intended audience.

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

  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 X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • 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 tenderarena.cz

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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
57
Security headers
20
Email security
55
DNS health
80
Network security
100
GDPR outside view
10
Average
54

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

Tender arena operates in the government sector, providing an electronic platform for public procurement and e-auctions in the Czech Republic. Its competitive advantage lies in certification and specialization for public tenders, targeting contracting authorities and suppliers. The business model revolves around offering a digital tool to streamline procurement processes, likely generating revenue through service fees or subscriptions. The company maintains a focused partnership ecosystem, with no evident subsidiaries or parent companies. Growth indicators include a stable domain age and consistent branding. The platform's integration with official Czech services (fen.cz) suggests strategic alignment with regulatory frameworks.

Security posture

The website demonstrates a moderate security maturity level with HTTPS enforced and no visible vulnerabilities in the HTML content. However, the lack of security headers and absence of a published security policy or incident response contacts indicate areas for improvement. GDPR compliance is weak due to missing privacy and cookie policies. No vulnerability disclosure or security.txt files were found, limiting transparency for security researchers. The platform would benefit from implementing security best practices such as CSP headers, explicit privacy notices, and incident response mechanisms to enhance trust and compliance.

Recommendations

  1. Implement and publish a comprehensive privacy policy and cookie policy with GDPR compliance details.
  2. Add security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to improve security posture.
  3. Provide clear contact information for security incidents and consider publishing a vulnerability disclosure or security.txt file.
  4. Enhance accessibility features to improve usability for all users.
  5. Regularly audit and update third-party scripts and tracking tools to ensure no vulnerabilities are introduced.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Tender systems s.r.o.
Description
Tender arena – certifikovaný elektronický nástroj pro zadávání veřejných zakázek a e-aukce
Key services
Electronic public procurement tool, E-auctions, Supplier registration and bidding
Content quality
good
Branding
consistent

Technology

Stack
Angular 8.2.14, Google Analytics, POWR.io widgets
Frameworks
Angular
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enabled
  • No exposed sensitive data in HTML
  • No visible vulnerable libraries

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
poor

Advertising

Marketing tools
POWR.io
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. No explicit privacy, cookie, or terms of service policies found on the main page.
  3. No contact emails, phone numbers, or physical addresses explicitly listed in the HTML content.
  4. The site uses modern Angular framework and integrates Google Analytics for tracking.
  5. The business operates in the government/public procurement sector in the Czech Republic.
  6. No security.txt or vulnerability disclosure information found.
  7. No visible security headers detected in the HTML content.
  8. The site is well-branded and consistent with a professional public sector tool.
Technical notes

Notes

The website uses a modern Angular framework (version 8.2.14) and integrates Google Analytics for user tracking. Hosting is managed by Websupport, a Czech hosting provider, consistent with the domain's nameservers. The site loads multiple asynchronous scripts for analytics and widgets (POWR.io). Performance is moderate with good mobile optimization and SEO meta tags present. However, no CMS was detected, indicating a custom or framework-based build. Accessibility is basic, and no advanced technical SEO or structured data (JSON-LD) was found. The site lacks security headers, which is a technical risk. Overall, the technical infrastructure is solid but could be improved with enhanced security and accessibility features.
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. 54/100Medium36 findingsView report
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