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Security report for sui.io

Mysten Labs, Inc · Technology · United States

Partial score · DNS & email only

75/100

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

Sui.io represents the online presence of Mysten Labs, Inc, a US-based technology company founded in 2020 specializing in a Layer 1 blockchain and smart contract platform. The platform aims to deliver the benefits of Web3 with the ease of Web2, targeting developers and enterprises building scalable, secure, and affordable blockchain applications. The website offers extensive developer resources, community engagement, and ecosystem funding opportunities, positioning itself as an innovative player in the blockchain infrastructure market. The site is professionally designed, mobile-optimized, and integrates modern web technologies and marketing tools, reflecting a mature digital infrastructure. Security posture is strong with HTTPS and Cloudflare DNS, though improvements are recommended in DNSSEC and explicit security policies. Privacy compliance is basic, with newsletter consent forms present but no dedicated privacy or cookie policies found. Overall, the website and domain registration data indicate a trustworthy and legitimate business with a clear focus on blockchain technology and developer support.

Scanned

NIS2 and GDPR posture

Checks completed
6of 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

3 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 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 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';…

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching sui.io

This scan found 15 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
75
Security headers
50
Email security
85
DNS health
80
Network security
100
Average
78
After the cap
75

Not counted

  • GDPR outside view: did not complete in this scan.
  • 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

Mysten Labs, Inc operates in the blockchain technology sector, offering a Layer 1 blockchain platform named Sui. The company targets developers and enterprises seeking scalable and secure Web3 infrastructure. Its business model revolves around providing blockchain infrastructure, developer tools, and ecosystem funding to foster innovation and adoption. The company maintains a strong community presence through events, hackathons, and educational resources. Partnerships and integrations with major platforms and social media channels enhance its market reach. The domain age and registrant information align with the company's founding date and business claims, supporting credibility. The company leverages multiple marketing and analytics tools to optimize user engagement and growth.

Security posture

The website demonstrates a solid security foundation with HTTPS enabled and domain registration through Cloudflare, including clientTransferProhibited status to prevent unauthorized transfers. However, DNSSEC is not enabled, which is a recommended enhancement for DNS security. No explicit security policies, incident response contacts, or vulnerability disclosure mechanisms are published, representing gaps in transparency and preparedness. The use of multiple third-party marketing and analytics scripts introduces potential privacy considerations. No vulnerabilities or exposed sensitive data were detected in the content. Overall, the security posture is good but could be improved by publishing formal security policies and enabling DNSSEC.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish a comprehensive privacy policy and cookie policy with clear consent mechanisms to improve GDPR and privacy compliance.
  3. Add a dedicated security policy page including incident response procedures and contact channels for security issues.
  4. Implement a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
  5. Provide direct contact information such as company emails or phone numbers for business and security inquiries to enhance trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mysten Labs, Inc
Description
Sui is a first-of-its-kind Layer 1 blockchain and smart contract platform designed to make digital asset ownership fast, private, secure, and accessible.
Key services
Layer 1 blockchain platform, Smart contract platform, Developer portal and resources, Ecosystem funding and grants, Community events and programs
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow CMS, Google Tag Manager, Google Fonts, Swiper.js, Facebook Pixel, LinkedIn Insight Tag, Twitter Universal Website Tag, HubSpot forms, Enzuzo cookie bar
Frameworks
Webflow
Platforms
Cloudflare (Registrar and DNS)
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • Use of Cloudflare DNS

Analytics and tracking

Services
Google Analytics (via Google Tag Manager), Facebook Pixel, LinkedIn Insight Tag, Twitter Universal Website Tag
Tracking level
extensive
Privacy practices
basic

Advertising

Ad networks
Facebook Ads, Twitter Ads, LinkedIn Ads, Google Ads
Tracking pixels
Facebook Pixel, LinkedIn Insight Tag, Twitter Universal Website Tag
Marketing tools
HubSpot forms, Enzuzo cookie bar
Transparency
good

Site quality

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

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 homepage or main navigation.
  3. Multiple newsletter subscription forms with consent checkboxes are present, indicating some privacy awareness.
  4. Strong focus on developer resources, ecosystem funding, and community engagement.
  5. Use of modern web technologies and multiple marketing/analytics tools.
  6. No direct contact emails or phone numbers found; contact primarily via forms and social media.
  7. No security.txt or vulnerability disclosure information found.
  8. Domain registration data is transparent and consistent with business identity.
Technical notes

Notes

The website is built on the Webflow CMS platform, utilizing modern front-end technologies including Swiper.js for interactive sliders, Google Fonts for typography, and multiple marketing and analytics integrations such as Google Tag Manager, Facebook Pixel, LinkedIn Insight Tag, and Twitter Universal Website Tag. Hosting and DNS services are provided by Cloudflare, ensuring fast performance and robust SSL/TLS encryption. The site is well-optimized for mobile devices and accessibility, with clear navigation and professional design. No technical debt or deprecated libraries were detected. The use of HubSpot forms indicates structured data collection for marketing and community engagement. Overall, the technical infrastructure is modern, performant, and scalable.
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. 76/100Low24 findingsView report
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