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Security report for zaixianjisuan.com

Education · China

Medium risk. 7 critical or high findings in Email security, Security headers and 2 other checks.

Security score

50/100

Risk levelMedium

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

The website www.zaixianjisuan.com is a Chinese-language online platform offering a wide range of free calculation tools spanning mathematics, daily life, industrial calculations, and more. It targets a broad audience of users seeking convenient online utilities. The site is powered by 智启CMS and integrates advertising via Google Adsense and tracking through Baidu Analytics. The technical infrastructure includes jQuery and standard web technologies, with moderate performance and good mobile optimization. Security posture is moderate with presence of CSRF tokens but lacks explicit security headers and privacy policies. WHOIS data is unavailable, raising questions about domain registration legitimacy, though the website content appears professional and trustworthy. Overall, the site serves as a valuable educational and utility resource with room for improvement in privacy and security compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
50/ 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. 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 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

    • 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

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

Keep watching zaixianjisuan.com

This scan found 27 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

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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
62
Security headers
30
Email security
60
DNS health
60
Network security
40
GDPR outside view
50
Average
50

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

The platform positions itself as a comprehensive online calculator hub, likely monetized through advertising and membership services. It serves the education and general utility sector in China, providing tools for students, professionals, and general users. The extensive network of related subdomains and partner sites indicates a broad ecosystem. However, the lack of clear business registration and contact information limits transparency. The site’s content quality and navigation are strong, supporting user retention and engagement. Strategic partnerships with CMS providers and AI tool integrations suggest ongoing development and expansion.

Security posture

Security maturity is moderate. The presence of CSRF tokens indicates awareness of input security, but the absence of HTTP security headers (CSP, HSTS, X-Frame-Options) is a notable gap. No explicit privacy or cookie policies were found, which may impact GDPR compliance. The use of third-party scripts like Google Adsense and Baidu Analytics introduces tracking and potential privacy concerns. WHOIS data is missing, which could be a risk factor for domain legitimacy. Incident response and vulnerability disclosure mechanisms are not evident, suggesting limited readiness for security incidents.

Recommendations

  1. Implement comprehensive privacy and cookie policies with user consent mechanisms to improve compliance.
  2. Add and enforce HTTP security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options.
  3. Ensure HTTPS is properly configured and enforced site-wide with strong SSL/TLS settings.
  4. Provide clear contact information including security incident contacts and business registration details.
  5. Regularly audit third-party scripts and dependencies to mitigate vulnerabilities and privacy risks.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
在线计算网为广大网友免费提供超多超好用的在线小工具。致力于在线计算器的专业平台,提供各类生活计算器,行业计算器。包括但不限于金融理财,健康饮食,建筑工程,电子电器,日常生活等齐全的在线计算器服务。
Key services
数学计算工具, 生活工具, 网络工具, 星座运势, 工业计算, 汽车报价, 楼盘大全, 计算资讯, 智问, 效率办公
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Google Adsense, Baidu Analytics, 智启CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
50/100
Good practices seen
  • CSRF token present in meta tag

Analytics and tracking

Services
Baidu Analytics
Tracking level
moderate
Privacy practices
poor

Advertising

Ad networks
Google Adsense
Tracking pixels
Baidu Analytics
Transparency
basic

Site quality

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

Key observations

  1. Website provides a large variety of free online calculation tools across multiple categories.
  2. Content is primarily in Chinese language targeting Chinese users.
  3. No explicit privacy, cookie, or terms of service pages found in the main HTML content.
  4. No contact emails or phone numbers explicitly provided on the main page.
  5. Website uses Google Adsense and Baidu Analytics for advertising and tracking.
  6. No security headers detected in HTML content; CSRF token present indicating some security awareness.
  7. WHOIS data unavailable, indicating possible domain registration issues or privacy protection.
  8. Website is mobile optimized and uses a CMS named 智启CMS.
  9. No signs of adult or questionable content; content is educational and utility focused.
Technical notes

Notes

The website uses a traditional tech stack with jQuery and a proprietary CMS (智启CMS). It integrates Google Adsense for monetization and Baidu Analytics for user tracking. The site is mobile responsive and SEO optimized with proper meta tags and structured navigation. Performance is moderate, with room for improvement in loading speed and accessibility features. The lack of modern JavaScript frameworks or progressive web app features indicates potential technical debt. The absence of security headers and incomplete WHOIS data highlight areas for technical and operational enhancement.
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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