Skip to main content

Security report for duoweb.cz

DUOWEB s.r.o. · Technology · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

63/100

Risk levelMedium

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

DUOWEB s.r.o. is a Czech-based small technology company specializing in custom web and mobile application development with over 15 years of experience. Their services target businesses and corporations, focusing on retail software, sensoric evaluation, e-commerce platforms, and quality management solutions. The company emphasizes user-friendly design, high availability, and data security. The website presents a professional image with client references and certifications, supporting their market credibility. Technically, the site uses modern web technologies and is mobile optimized, though some security best practices like security headers and privacy policies are lacking. The absence of WHOIS data reduces domain trustworthiness, but business details and contact information are transparent. Overall, the company appears legitimate and established, but should improve compliance and security posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 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

7 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 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';…

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

Keep watching duoweb.cz

This scan found 24 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

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
62
Security headers
30
Email security
85
DNS health
75
Network security
100
GDPR outside view
25
Average
63

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

DUOWEB operates in the technology sector providing bespoke software solutions primarily for retail and enterprise clients. Their competitive advantage lies in deep business process analysis and custom software tailored to client needs, supported by SLA-based maintenance and development. The company maintains a portfolio of notable clients and projects, indicating steady business growth and market presence in the Czech Republic. Their business model is service-based with ongoing support contracts. The partnership with a sister domain (duoweb.net) suggests multilingual or international outreach. Revenue streams likely come from project development, licensing, and support services. The company’s transparent contact and registration details enhance credibility, though the missing WHOIS data is a concern for domain legitimacy verification.

Security posture

The website demonstrates a moderate security posture with HTTPS assumed but no explicit security headers detected in the HTML source. Forms collect user data but lack visible advanced protections such as CAPTCHA or CSRF tokens. No privacy or cookie policies are present, indicating compliance gaps with GDPR and related regulations. The absence of vulnerability disclosure or incident response information suggests limited formal security governance. No exposed sensitive data or vulnerable libraries were detected in the source. Overall, the security maturity is moderate but could be significantly improved by implementing security headers, privacy notices, and formal incident response channels.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies with GDPR compliance details.
  2. Add security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  3. Verify and ensure SSL/TLS configuration is strong and up to date.
  4. Establish and disclose a vulnerability disclosure policy and incident response contact.
  5. Improve accessibility features and include ARIA roles and labels for better compliance.

Contact details published on the site

Addresses
Legal name
DUOWEB s.r.o.
VAT number
CZ01663801
Registration number
C 32191
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
DUOWEB s.r.o.
Description
DUOWEB s.r.o. specializes in custom web and mobile application development with over 15 years of experience. They focus on business and enterprise web applications with features like multi-user environments, high availability, data security, and responsive design.
Key services
Custom web application development, Mobile application development, Retail software solutions, Sensoric evaluation software, E-commerce platforms, Quality management software, Reporting tools, Data import/export solutions
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, jQuery, Bootstrap, Owl Carousel, Font Awesome, Custom JS framework
Frameworks
Custom proprietary programming framework
Platforms
Windows, Apple, Linux, Android, iPhone, Chrome, Firefox, Internet Explorer
Performance
moderate
Mobile
excellent
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • Use of HTTPS assumed (not explicitly confirmed)
  • No exposed sensitive data in HTML
  • Forms use standard input types with required fields

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with rich content and navigation.
  2. No privacy or cookie policy pages found, which is a compliance gap.
  3. Contact information is clearly presented with multiple channels.
  4. WHOIS data is missing, which is unusual and warrants further investigation.
  5. No security headers detected in HTML source; security posture can be improved.
  6. No analytics or tracking scripts detected, indicating minimal user tracking.
  7. Website is professionally designed and mobile responsive.
  8. No signs of adult or questionable content.
Technical notes

Notes

The website uses a custom programming framework alongside common front-end technologies like HTML5, CSS3, JavaScript, jQuery, Bootstrap, and Owl Carousel. It supports multiple platforms and browsers, including mobile devices, with responsive design. Performance is moderate with no major issues detected. The site lacks a CMS and appears to be a custom-built solution. No analytics or tracking scripts were found, indicating minimal user tracking. Hosting provider details are not disclosed. The technical implementation is solid but could benefit from enhanced security configurations and accessibility improvements.
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

Reviews of this site

Share your experience with duoweb.cz. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review duoweb.cz.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.