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Security report for cnb.cool

Tencent, Inc. · Technology · China

Medium risk. 7 critical or high findings in Security headers, GDPR outside view and 3 other checks.

Security score

65/100

Risk levelMedium

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

The website cnb.cool represents a cloud-native build platform dedicated to accelerating software development for developers and teams. It is supported by Tencent Cloud and operated under Tencent, Inc., reflecting a strong market position in the technology sector. The platform offers key services such as declarative build environments, Docker-based execution, remote workspaces, and a plugin ecosystem, targeting modern cloud-native development workflows. The business model is SaaS-based, focusing on developer productivity and cloud integration. Technically, the website is built using modern web technologies including Next.js (React framework), Docker, and OverlayFS for instant cloning. It leverages Tencent Cloud's infrastructure and monitoring tools like Tencent Cloud RUM for performance analytics. The site demonstrates good performance, mobile optimization, and SEO practices, although accessibility features are basic. The technical stack and infrastructure indicate a mature and scalable platform suitable for enterprise use. From a security perspective, the site enforces HTTPS with strong domain registration protections such as clientTransferProhibited status. Scripts use nonce attributes indicating Content Security Policy awareness. However, there is room for improvement by enabling DNSSEC, adding explicit security headers, and publishing security policies or vulnerability disclosure information. No vulnerabilities or exposed sensitive data were detected, and the site does not appear to be blocked or protected by a WAF. Overall, the website presents a professional, trustworthy, and secure platform with comprehensive business and technical information. Privacy policies and terms of service are available, though cookie consent mechanisms are absent. The risk profile is low, with recommendations focusing on enhancing security headers, privacy compliance, and incident response transparency.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
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

7 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 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

  3. 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.

    • High

      No SPF record found

      SPF helps prevent email spoofing

      What to do: Add SPF record: "v=spf1 include:_spf.yourmailprovider.com ~all"

    • High

      No DMARC record found

      DMARC provides email authentication and reporting

      What to do: Add DMARC record: "v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com"

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

Keep watching cnb.cool

This scan found 22 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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Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
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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
60
Email security
42
DNS health
60
Network security
100
GDPR outside view
53
Average
65

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

cnb.cool operates as a cloud-native build platform under Tencent, Inc., targeting software developers and teams seeking efficient build and development pipelines. Its competitive advantage lies in leveraging Tencent Cloud's infrastructure and providing declarative, Docker-based build environments with rapid resource acquisition and remote workspace capabilities. The SaaS business model facilitates scalable usage and integration with modern development workflows. The platform's partnership with Tencent Cloud and use of Tencent's monitoring services indicate a strong ecosystem presence. Growth indicators include recent domain registration and active development of features such as instant cloning technology. Strategic observations suggest focusing on expanding developer engagement and enhancing compliance to strengthen market position.

Security posture

The security posture of cnb.cool is solid, with HTTPS enforced and domain registration protections in place. The use of nonce attributes in scripts suggests awareness of Content Security Policy best practices. No exposed sensitive data or vulnerable libraries were found in the HTML content. However, the absence of DNSSEC and explicit security headers like X-Frame-Options or Content-Security-Policy reduces the overall security maturity. There is no publicly available incident response or vulnerability disclosure information, which could impact readiness for security events. Privacy compliance is partial, with privacy and terms policies present but lacking cookie consent mechanisms. Overall, the site demonstrates a good security baseline suitable for enterprise SaaS but could improve transparency and technical controls.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Implement and verify security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Add a cookie consent mechanism to comply with privacy regulations and improve user transparency.
  4. Publish a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  5. Provide explicit incident response contact information and security policy details on the website.

Contact details published on the site

Addresses
Legal name
Tencent, Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Tencent, Inc.
Description
Our developer platform is dedicated to helping developers accelerate software development.
Key services
Cloud Native Build pipelines, Declarative build environment, Docker-based execution environment, Remote workspace and instant cloning technology, Plugin ecosystem for Docker
Content quality
good
Branding
consistent

Technology

Stack
React (Next.js), Docker, OverlayFS, Tencent Cloud RUM, JavaScript, YAML for pipeline configuration
Frameworks
Next.js
Platforms
SaaS, Cloud Native Build
Performance
fast
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Domain status includes clientTransferProhibited and clientUpdateProhibited
  • No exposed sensitive data in HTML
  • Use of nonce attributes in scripts for CSP
  • No vulnerable libraries detected in scripts

Analytics and tracking

Services
Tencent Cloud RUM
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Tencent Cloud RUM
Transparency
basic

Site quality

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

Key observations

  1. Website is a cloud-native build platform supported by Tencent Cloud.
  2. Content is developer-focused with detailed technical features and YAML configuration examples.
  3. No signs of malicious or adult content.
  4. Good use of modern web technologies and cloud infrastructure.
  5. WHOIS data supports legitimacy and domain security.
  6. Privacy and terms policies are present and accessible.
  7. No explicit cookie consent mechanism detected.
  8. No direct contact emails or phone numbers found; contact via feedback form and physical address only.
Technical notes

Notes

The website is built on a modern React-based framework (Next.js) with server-side rendering and static asset delivery via Tencent Cloud CDN. It uses Docker containers extensively for build and execution environments, supporting declarative YAML configurations. Performance is optimized with preloading and deferred script loading. The site is mobile-optimized and uses Tencent Cloud RUM for real-time monitoring. There is no detected CMS, indicating a custom or framework-based implementation. Technical risks are minimal, though the lack of some security headers and cookie consent mechanisms represent areas for modernization. Overall, the technical infrastructure supports scalable, cloud-native development workflows with good performance and reliability.
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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