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Security report for d4sign.com.br

D4Sign · Technology · Brazil

Medium risk. 5 critical or high findings in Security headers and GDPR outside view.

Security score

71/100

Risk levelMedium

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

D4Sign is Brazil's leading electronic and digital signature platform, offering a comprehensive SaaS solution that integrates advanced AI capabilities to streamline document signing and contract management. The company serves a broad audience including businesses and individuals, providing secure authentication methods linked to government data for enhanced trust and legal compliance. Technically, the website is built on WordPress with multiple modern plugins and integrates various marketing and analytics tools, hosted on AWS. However, the current SSL/TLS configuration is invalid, posing a significant security risk. The company demonstrates strong market presence with over 500,000 companies trusting its services and certifications such as Great Place To Work and sustainability seals. Privacy and cookie policies are comprehensive and GDPR compliant, with active consent mechanisms.

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

5 findings rated critical or high. Fix these first.

  1. 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"

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • 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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, LinkedIn, YouTube, Cloudflare, Google APIs

      What to do: Document all third-party data sharing in your privacy policy

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

Keep watching d4sign.com.br

This scan found 19 issues across 5 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

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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
100
Security headers
45
Email security
75
DNS health
80
Network security
100
GDPR outside view
25
Average
71

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

D4Sign holds a dominant market position in Brazil's electronic signature sector, leveraging AI to differentiate its offerings. Its business model focuses on SaaS subscriptions with tiered plans and API integrations, targeting corporate clients across multiple sectors. The platform's integration with government databases for authentication and its extensive authentication options provide competitive advantages. The company maintains a strong partnership ecosystem and invests in customer trust through certifications and testimonials. Growth indicators include a large client base and active marketing campaigns. The use of multiple external domains for marketing and secure services indicates a mature digital presence.

Security posture

The security posture of D4Sign's website shows mixed maturity. While SPF and DMARC email authentication are properly configured, the lack of a valid SSL certificate and disabled TLS protocols are critical vulnerabilities that undermine user trust and data security. The absence of HSTS and OCSP stapling further weakens the HTTPS implementation. No explicit security or incident response policies are publicly available, which may impact compliance with regulations like GDPR and NIS2. The platform uses AWS hosting, which provides a secure infrastructure foundation, but the website's SSL misconfiguration must be urgently addressed. Cookie consent management is robust, indicating good privacy practices.

Recommendations

  1. Immediately install and maintain a valid SSL/TLS certificate to secure all web traffic.
  2. Enable modern TLS protocols (TLS 1.2 and 1.3) and disable deprecated versions to enhance encryption.
  3. Implement HTTP Strict Transport Security (HSTS) with includeSubDomains and preload to prevent protocol downgrade attacks.
  4. Enable OCSP stapling to improve certificate revocation checking and reduce latency.
  5. Publish a clear security policy and incident response plan accessible to users to improve transparency and compliance.

Contact details published on the site

Addresses
Legal name
D4S Serviços em Tecnologia
Registration number
CNPJ 23.691.353/0001-80
Technical notes

Notes

The website is built on a WordPress CMS platform with Elementor and various plugins for marketing, analytics, and user engagement. It uses AWS for hosting, ensuring scalable and reliable infrastructure. The site has a large page size and high resource count, resulting in slow load times, indicating potential optimization opportunities. The tech stack includes JavaScript libraries like jQuery, Tiny Slider, Swiper, and integrations with HubSpot, ActiveCampaign, and multiple tracking services. The site is mobile-optimized with good SEO practices but could improve accessibility. The invalid SSL configuration is a major technical risk that could affect user trust and search rankings.
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

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