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Security report for mustard.cz

Mustard s.r.o. · Media · Czech Republic

High risk. 11 critical or high findings in GDPR outside view, Security headers and 3 other checks.

Security score

48/100

Risk levelHigh

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

Mustard s.r.o. is a Czech Republic-based creative agency specializing in advanced digital communication, media production, publishing, and creative services. Established in 2011, the company targets businesses and brands seeking innovative content solutions, leveraging multimedia and storytelling to build brand presence. The website showcases a portfolio of international campaigns and video case studies, reflecting a solid market position in the media industry. Technically, the website employs a modern tech stack including jQuery, Modernizr, Google Analytics, Mouseflow, Hotjar, and Google Maps API, indicating a mature digital infrastructure. The site is moderately performant, mobile-optimized, and features good design and navigation, though accessibility and SEO optimizations are basic. From a security perspective, the site uses HTTPS and avoids exposing sensitive data but lacks important security headers and explicit privacy or cookie policies, which are critical for GDPR compliance. Extensive user tracking is present without visible consent mechanisms, representing a privacy compliance gap. WHOIS data confirms domain legitimacy and consistency with the business profile. Overall, the website is professional and credible but requires improvements in privacy compliance and security best practices to enhance 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

11 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';…

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

Keep watching mustard.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.

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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
15
Email security
85
DNS health
85
Network security
20
GDPR outside view
10
Average
48

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

Mustard operates as a small-sized media and creative agency focused on digital communication and content production. Its competitive advantage lies in producing high-quality video content and creative campaigns for international clients. The business model revolves around service delivery in media, publishing, production, and creative direction. Revenue streams likely derive from client projects and branded entertainment. The company maintains an active social media presence and showcases a portfolio of notable campaigns, indicating growth and market engagement. Partnerships with platforms like Vimeo and use of analytics tools suggest a data-driven approach to marketing and client engagement.

Security posture

The current security posture is moderate. HTTPS is implemented, but the absence of security headers such as Content-Security-Policy, X-Frame-Options, and HSTS reduces protection against common web attacks. No incident response or vulnerability disclosure information is provided, limiting transparency and readiness. The use of multiple third-party tracking tools without explicit consent mechanisms poses privacy risks and potential GDPR non-compliance. No forms are present on the main page, reducing attack surface. Recommendations include adding security headers, privacy policies, and incident response contacts to improve security maturity and compliance.

Recommendations

  1. Implement comprehensive privacy and cookie policies with explicit user consent mechanisms to ensure GDPR compliance.
  2. Add security headers including Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, and HSTS to enhance web security.
  3. Establish and publish a vulnerability disclosure policy and security.txt file to improve transparency and incident response readiness.
  4. Review and minimize third-party tracking scripts or provide clear opt-in mechanisms to respect user privacy.
  5. Enhance accessibility features and SEO optimizations to improve user experience and search engine visibility.

Contact details published on the site

Addresses
Legal name
Mustard s.r.o.
VAT number
CZ28531418
Registration number
28531418
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mustard s.r.o.
Description
The core Mustard team consists of people from all branches involved in creating advanced digital communication. Communication. Production. Programming.
Key services
media, publishing, production, creative, direction
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Google Analytics, Mouseflow, Hotjar, Google Maps API, Vimeo embedded videos
Frameworks
Modernizr
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
65/100
Good practices seen
  • Use of HTTPS (implied by Google Analytics script loading over https)
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Mouseflow, Hotjar
Tracking level
extensive
Privacy practices
poor

Advertising

Tracking pixels
Mouseflow, Hotjar
Marketing tools
Mouseflow, Hotjar
Transparency
basic

Site quality

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

Key observations

  1. Website is a professional creative agency site with rich multimedia content
  2. No privacy or cookie policies found, indicating compliance gaps
  3. Extensive use of third-party analytics and tracking tools without visible consent mechanisms
  4. Contact information is clearly provided with multiple channels
  5. No security headers detected, potential for improvement in security posture
  6. No forms detected on the main page, limiting data collection risks
  7. WHOIS data supports legitimacy and consistent business presence
Technical notes

Notes

The website uses a combination of jQuery, Modernizr, and several third-party analytics and tracking services such as Google Analytics, Mouseflow, and Hotjar. Embedded Vimeo videos provide rich multimedia content. The site loads scripts asynchronously to improve performance. Hosting is via REG-WEBGLOBE, a Czech registrar, consistent with the business location. The site is mobile-optimized with responsive design elements. However, accessibility features are basic, and SEO meta tags are minimal. No CMS is detected, suggesting a custom or static site. Performance is moderate, with opportunities to optimize loading times and reduce tracking overhead.
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. 48/100High33 findingsView report
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