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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 small, established creative agency based in Prague, Czech Republic, specializing in advanced digital communication, media production, and creative content services. The company has a strong portfolio featuring international campaigns and multiple awards, positioning itself as a reputable player in the media industry. Their website showcases a professional design with rich multimedia content and clear contact information, targeting businesses seeking high-quality digital communication solutions. Technically, the website uses modern web technologies including HTML5, CSS3, JavaScript, and integrates analytics and user behavior tracking tools such as Google Analytics, Mouseflow, and Hotjar. However, there is no evidence of a CMS or advanced frameworks beyond Modernizr and jQuery. Security posture is moderate with no visible security headers and unknown SSL configuration, while privacy compliance is lacking due to absence of privacy and cookie policies. Overall, the website is functional and professional but could improve in security and privacy compliance to enhance trust and regulatory adherence.

Scanned

This is an earlier scan of mustard.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

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.

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

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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 in the media sector with a business model focused on creative digital content production and communication services. Their market position is supported by a decade-long domain registration and a portfolio of international campaigns, indicating stable operations and industry recognition. The company targets corporate clients and brands requiring media production, publishing, and creative direction. Revenue streams likely derive from project-based contracts and creative services. The presence of social media channels and video hosting on Vimeo supports a modern marketing approach. No parent or subsidiary companies are identified, suggesting independent operation. The company demonstrates consistent branding and trust indicators such as awards and client references, although the lack of formal privacy and security policies may impact credibility in privacy-conscious markets.

Security posture

The website's security maturity is moderate. While no critical vulnerabilities or exposed sensitive data were detected, the absence of security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces protection against common web attacks. The use of HTTPS is implied but not explicitly confirmed in the data. The site employs multiple third-party tracking scripts without visible consent mechanisms, posing privacy compliance risks under GDPR. No incident response or vulnerability disclosure information is provided, indicating limited preparedness for security incidents. Overall, the security posture is functional but requires enhancements in headers, privacy policies, and incident response readiness to meet best practices and regulatory requirements.

Recommendations

  1. Implement comprehensive privacy and cookie policies with clear GDPR compliance statements and consent mechanisms.
  2. Add and configure essential security headers including Content Security Policy, HSTS, X-Frame-Options, and X-XSS-Protection.
  3. Verify and enforce HTTPS with strong SSL/TLS configurations to ensure secure communications.
  4. Establish a vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  5. Develop and publish incident response contact channels to improve security transparency and readiness.

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. Great content can create bonds, build brands, reduce costs and earn media exposure.
Key services
media, publishing, production, creative, direction
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, jQuery, Google Analytics, Mouseflow, Hotjar, Google Maps API, Vimeo embedded videos
Frameworks
Modernizr
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
60/100
Good practices seen
  • No exposed sensitive data in HTML
  • No visible vulnerable libraries

Analytics and tracking

Services
Google Analytics, Mouseflow, Hotjar
Tracking level
moderate
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 digital media and communication agency based in Prague, Czech Republic.
  2. No privacy or cookie policies found, indicating potential GDPR compliance gaps.
  3. Contact information is clearly provided including phone, email, and physical addresses.
  4. Multiple embedded tracking and analytics tools are used without visible consent mechanisms.
  5. No security headers detected in the HTML content; SSL status unknown but HTTPS is implied by external scripts.
  6. No forms detected on the homepage; contact likely via email or phone.
  7. Content is rich with portfolio references and video showcases.
  8. No signs of suspicious or malicious content.
  9. WHOIS data supports legitimacy and domain age is appropriate.
Technical notes

Notes

The website is built with standard web technologies including HTML5, CSS3, and JavaScript, leveraging jQuery and Modernizr for compatibility and feature detection. It integrates multiple analytics and user behavior tracking tools such as Google Analytics, Mouseflow, and Hotjar, indicating a focus on user experience optimization. The site loads external resources from trusted domains like Vimeo and Google APIs. Performance is moderate with no major issues detected, and mobile optimization is good. However, the absence of a detected CMS or advanced frameworks suggests a custom or static site approach, which may limit scalability. Accessibility features are basic, and SEO optimization is good with proper meta tags and structured content. Technical debt appears low but could be improved by adopting modern frameworks and enhancing accessibility 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

Earlier scans of this domain

  1. 48/100High33 findingsView report
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