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Security report for nestbrowser.com

NestBrowser · Technology · Hong Kong

Medium risk. 8 critical or high findings in Email security, Security headers and 1 other check.

Security score

62/100

Risk levelMedium

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

NestBrowser is a technology company specializing in fingerprint browser software and cloud mobile phone solutions tailored for cross-border e-commerce professionals. Their flagship product offers multi-account management with anti-fraud fingerprint masking technology, enabling users to manage multiple profiles without detection. The company also provides cloud-based Android devices and RPA automation tools to enhance marketing and operational efficiency. The website reflects a modern technical infrastructure using React and Next.js frameworks, hosted on Alibaba Cloud, with moderate performance and good mobile optimization. Security posture is adequate with HTTPS enabled but lacks advanced security headers and DNSSEC, indicating areas for improvement. Privacy compliance is minimal with no visible privacy or cookie policies, and tracking is done via Google Analytics without explicit consent mechanisms. Overall, the business credibility is solid with clear contact information and consistent domain registration data, but the site would benefit from enhanced security and privacy transparency to improve trust and compliance.

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. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  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';…

  3. 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

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

Keep watching nestbrowser.com

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.

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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
15
Email security
60
DNS health
60
Network security
100
GDPR outside view
35
Average
62

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

NestBrowser positions itself as a leading provider of anti-detection fingerprint browsers and cloud mobile solutions for the cross-border e-commerce sector. Their business model revolves around SaaS and cloud services, targeting marketers and sellers who require multiple isolated online identities to avoid bans and fraud detection. The company leverages proprietary technology and RPA automation to differentiate itself in a competitive market. With over 5 years of experience claimed and a growing user base, NestBrowser focuses on innovation and customization, including offering free RPA customization services. The partnership ecosystem is not explicitly detailed, but the use of Alibaba Cloud and Google services indicates integration with major technology providers. The company is based in Hong Kong, aligning with its international e-commerce focus.

Security posture

The website demonstrates a basic security maturity level with HTTPS enabled and no visible exposure of sensitive data. However, the absence of DNSSEC and security headers such as Content-Security-Policy and X-Frame-Options reduces its defense-in-depth. There is no published security policy or incident response contact, and no vulnerability disclosure mechanism is present. The use of Google Tag Manager and Analytics introduces moderate user tracking without clear consent, which may pose compliance risks under GDPR. Overall, while no critical vulnerabilities are evident, the security posture could be significantly improved by adopting standard security headers, enabling DNSSEC, and publishing clear privacy and security policies.

Recommendations

  1. Enable DNSSEC on the domain to protect against DNS spoofing and improve domain security.
  2. Implement standard security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  3. Publish comprehensive privacy and cookie policies with explicit GDPR compliance statements and implement a cookie consent mechanism.
  4. Establish and publish a security policy and incident response contact information to enhance transparency and trust.
  5. Add a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
NestBrowser
Description
Nestbrowser is a software that customizes all parameters to hide and control your digital fingerprint. By masking these settings, you can bypass anti-fraud systems by imitating your real Internet identity. Nestbrowser helps you create lots of profiles, each with its own digital fingerprint. These profiles don't overlap each other, so websites don't ban your account. This is great for performing various tasks online.
Key services
Fingerprint browser for anti-detection, Hive Cloud Box (Android cloud phone device), Multi-account management, RPA automation, Cloud mobile phone services
Content quality
good
Branding
consistent

Technology

Stack
React, Next.js, Material-UI, JavaScript, Google Tag Manager
Frameworks
Next.js, Material-UI
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
65/100
Good practices seen
  • HTTPS enabled
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Google Analytics (via Google Tag Manager)
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. No explicit privacy, cookie, or terms of service pages found on the homepage.
  3. Contact information is clearly provided in the footer with phone, email, and physical address.
  4. Website uses modern web technologies and frameworks.
  5. Security headers are missing and DNSSEC is not enabled, indicating room for security improvements.
  6. Google Analytics is used for tracking, but no explicit cookie consent mechanism detected.
  7. Content is business-focused, targeting cross-border e-commerce professionals.
  8. No adult or questionable content detected.
  9. WHOIS data supports domain legitimacy and business consistency.
Technical notes

Notes

The website is built on a modern React and Next.js stack with Material-UI for UI components, indicating a contemporary and maintainable codebase. Hosting is provided by Alibaba Cloud, a reputable provider, ensuring reliable infrastructure. Performance is moderate with preloading of fonts and scripts, but could be optimized further. Mobile optimization is good, and accessibility features are basic but present. SEO is basic with meta tags and keywords but lacks structured data like JSON-LD for enhanced search presence. The absence of a CMS suggests a custom or static site generation approach. Overall, the technical implementation supports the business needs but has room for enhancements in performance, accessibility, and SEO.
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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