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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 electronic platform specializing in certified tools for public procurement and e-auctions. The platform serves contracting authorities and suppliers, facilitating transparent and efficient public tender processes. Established in 2013, the company operates under Tender systems s.r.o. and holds a recognized position within the government sector for electronic procurement solutions. The website demonstrates a professional design with clear navigation and relevant content tailored to its target audience. Technically, the website is built using Angular 8.2.14, integrates Google Analytics and Google Tag Manager for tracking, and uses POWR.io widgets. Hosting is provided by Websupport, a Czech hosting provider. The site is mobile-optimized and SEO-friendly, though accessibility features are basic. Performance is moderate, with room for improvement in security headers and privacy compliance. From a security perspective, the site uses HTTPS and avoids exposing sensitive data in the HTML. However, it lacks explicit security headers and does not provide privacy or cookie policies, which are important for GDPR compliance. No vulnerability disclosure or incident response contacts are present, limiting transparency in security matters. The WHOIS data confirms domain legitimacy and consistency with the business profile. Overall, Tender Arena presents a trustworthy and professional service platform with moderate technical maturity and security posture. Strategic improvements in privacy compliance, security headers, and incident response transparency would enhance its security and trustworthiness.

Scanned

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

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

This scan found 27 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
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 electronic procurement tools that enable contracting authorities to announce tenders and suppliers to submit bids. Its competitive advantage lies in certification and specialization in public procurement processes within the Czech Republic. The business model revolves around software-as-a-service for public tenders and e-auctions, targeting government bodies and suppliers. Revenue streams likely include subscription or usage fees for access to the platform. The company shows stable growth indicators with a focused partnership ecosystem, including fen.cz for identity verification. The platform's strategic positioning as a certified tool supports its market presence and credibility.

Security posture

The current security maturity level is moderate. The website uses HTTPS and avoids exposing sensitive data, but lacks important security headers such as Content Security Policy, HSTS, and X-Frame-Options. There is no visible vulnerability disclosure or security.txt file, and no contact channels for incident response are provided. GDPR compliance is limited due to missing privacy and cookie policies. These gaps could impact user trust and regulatory compliance. The absence of explicit security frameworks or certifications reduces confidence in security culture. Addressing these issues would improve incident readiness and data protection practices.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies to improve GDPR compliance.
  2. Add security headers including Content Security Policy, HSTS, and X-Frame-Options to enhance protection against common web attacks.
  3. Provide clear contact information for security incidents and consider publishing a vulnerability disclosure policy or security.txt file.
  4. Enhance accessibility features to improve usability for all users and comply with accessibility standards.
  5. Regularly review and update third-party scripts and dependencies to mitigate potential vulnerabilities.
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
65/100
Good practices seen
  • HTTPS usage implied by URL (https://)
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
poor

Advertising

Ad networks
Google Ads (AW-878867672)
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. Uses modern Angular framework and integrates Google Analytics and Google Ads for tracking and marketing.
  5. Business is focused on electronic public procurement tools in Czech Republic.
  6. WHOIS data supports legitimacy and domain age is appropriate.
  7. No security headers detected in provided data; security posture can be improved.
  8. No vulnerability disclosure or security.txt found.
  9. Content is professional, safe, and targeted at government and business users.
Technical notes

Notes

The website is built on a modern Angular framework (version 8.2.14) and integrates Google Analytics and Google Tag Manager for analytics and marketing. Hosting is managed by Websupport, a Czech hosting provider, with domain registration dating back to 2013, indicating a mature infrastructure. Performance is moderate with good mobile optimization and SEO practices. However, the lack of security headers and limited accessibility features suggest technical debt and areas for modernization. The use of POWR.io widgets adds functionality but should be monitored for security and performance impact. Overall, the technical infrastructure supports the business needs but would benefit from security and accessibility enhancements.
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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