Skip to main content

Security report for duncanleo.me

Undertide · Technology · Singapore

Medium risk. 8 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

61/100

Risk levelMedium

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

The website www.duncanleo.me is a personal professional portfolio for Duncan Leo, a software engineer based in Singapore. The site highlights his co-founding of Undertide, a development studio, and his current role at Taskade. It showcases various projects and professional experiences, targeting technology professionals, potential clients, and collaborators. The business model centers on software development services and personal branding within the technology sector. The site is well-structured, mobile-optimized, and uses modern technologies such as Hugo, React, and Next.js. From a technical perspective, the site is built with a static site generator (Hugo) and integrates modern web frameworks and languages. It demonstrates good performance, mobile optimization, and accessibility. However, no hosting provider or SSL configuration details were available from the data provided. Security headers are not detected, and no privacy or cookie policies are present, indicating room for improvement in compliance and security posture. Security-wise, the site does not expose sensitive data and shows no visible vulnerabilities. The absence of security headers and privacy policies reduces the overall security and privacy compliance score. WHOIS data is unavailable due to query failure or privacy protection, but the website content is consistent with a legitimate personal professional presence. No suspicious patterns or indicators of malicious activity were found. Overall, the website is professional and trustworthy but would benefit from enhanced security headers, privacy and cookie policies, and incident response information to improve compliance and security posture. The domain WHOIS privacy protection is justified given the personal nature of the site.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
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

8 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"

    • 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. 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

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

Keep watching duncanleo.me

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
75
Security headers
30
Email security
70
DNS health
55
Network security
100
GDPR outside view
35
Average
61

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention duncanleo.me, from OffSeq Breach.

No leaked records found

Breach holds no records for duncanleo.me right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Duncan Leo operates as a small independent software development professional and co-founder of Undertide, focusing on full-stack web and mobile applications. The business targets technology clients and collaborators, leveraging a portfolio of projects and professional experience to build credibility. The business model is service-oriented with a strong emphasis on technical leadership and software engineering expertise. The partnership ecosystem includes Undertide and Taskade, with no subsidiaries or parent companies indicated. Growth indicators include ongoing employment at Taskade and continuous project development. The website serves as a digital resume and portfolio, supporting business development and professional networking.

Security posture

The current security maturity level is moderate. The website does not expose sensitive information and uses HTTPS (assumed from modern web standards, though SSL details are not explicit). However, the absence of security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces protection against common web attacks. No vulnerability disclosure or incident response contacts are provided, limiting readiness for security incidents. Privacy compliance is weak due to missing privacy and cookie policies. The security culture appears informal, consistent with a personal portfolio site rather than a corporate environment. Enhancements in security headers, privacy documentation, and incident response mechanisms are recommended to improve the security posture.

Recommendations

  1. Implement standard security headers including Content Security Policy, HSTS, and X-Frame-Options to enhance protection against web attacks.
  2. Publish a comprehensive privacy policy and cookie policy to improve GDPR and privacy compliance.
  3. Add a vulnerability disclosure policy or security.txt file to facilitate responsible security reporting.
  4. Include incident response contact information such as security@ or abuse@ email addresses to improve transparency and readiness.
  5. Regularly review and update technical dependencies and frameworks to mitigate potential vulnerabilities and maintain modern standards.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Undertide
Description
Personal website of Duncan Leo, a software engineer based in Singapore. He co-founded Undertide, a development studio building full-stack web and mobile apps, and currently works at Taskade. The site highlights his projects and professional experience.
Key services
Full-stack web and mobile app development, Technical leadership and software engineering
Content quality
good
Branding
consistent

Technology

Stack
Hugo, React, Next.js, Kotlin, Go, Swift, PostgreSQL, GraphQL
Frameworks
Hugo, React, Next.js
Platforms
Web, Android, iOS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
70/100
Good practices seen
  • No exposed sensitive data in HTML
  • No visible vulnerable libraries

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 a personal professional portfolio for a software engineer.
  2. No privacy, cookie, or terms of service policies found.
  3. No contact phone numbers or physical addresses provided.
  4. No security.txt or vulnerability disclosure found.
  5. No security headers detected in provided data.
  6. No analytics or tracking scripts detected.
  7. Content is well structured and professional.
  8. WHOIS data is unavailable, likely due to privacy protection or query failure.
Technical notes

Notes

The website is built using Hugo, a static site generator, combined with modern frontend frameworks such as React and Next.js. The tech stack includes Kotlin, Go, Swift, and PostgreSQL for backend and mobile app development, indicating a mature and diverse technology environment. Performance is fast with good mobile optimization and accessibility. The site uses Google Fonts and serves CSS and JS assets with integrity attributes, indicating attention to security best practices. No CMS beyond Hugo is detected. Hosting provider details are not available. The site lacks security headers and privacy policies, which are technical debt areas. Overall, the infrastructure is modern and well-implemented but could benefit from enhanced security and compliance features.
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 duncanleo.me. 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 duncanleo.me.

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.