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Security report for 51liuxue.com

Education · China

High risk. 9 critical or high findings in Network security, Security headers and 2 other checks.

Security score

41/100

Risk levelHigh

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

The website www.51liuxue.com is an education consulting platform specializing in overseas study application services for countries including the UK, US, Australia, Canada, Hong Kong, Macau, and Singapore. It highlights a 30-year professional team with a high success rate in assisting undergraduate, master's, and doctoral admissions. The site targets students and families seeking personalized overseas education solutions. Technically, the site is built using modern frontend technologies such as Vue.js and Element UI, providing a responsive and user-friendly experience. However, the site lacks visible privacy and cookie policies, and no contact information is explicitly provided in the analyzed HTML content. Security-wise, the site uses HTTPS but lacks important security headers, which could be improved to enhance protection. The WHOIS data is missing, which raises some concerns about domain registration legitimacy, although the active and professional website presence suggests recent registration or privacy protection. Overall, the site is functional and professional but would benefit from improved transparency and security practices.

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

9 findings rated critical or high. Fix these first.

  1. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • Critical

      Critical Service Exposed: MySQL

      Port 3306 (MySQL) is publicly accessible - MySQL - Database server

      What to do: Immediately restrict access to MySQL using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

  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 51liuxue.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
52
Security headers
15
Email security
70
DNS health
60
Network security
0
GDPR outside view
50
Average
41

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 · found on this site
  • 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 business operates in the education sector, focusing on international student recruitment and consulting services. Its competitive advantage lies in its long-standing experience (30 years) and high success rate (98.7%) in overseas study applications. The business model is service-based, providing tailored consulting for various academic levels and visa guidance. The target customers are prospective international students primarily from China. The website's marketing tools include Baidu Analytics and Meiqia chat for customer engagement. The absence of detailed business registration and contact information limits full credibility assessment. There are no detected partnerships or subsidiaries from the provided data.

Security posture

The website demonstrates a basic security posture with HTTPS enabled, ensuring encrypted communications. However, the lack of security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options reduces its defense against common web attacks. No vulnerabilities or exposed sensitive data were detected in the provided content. The absence of privacy and cookie policies indicates potential compliance gaps with GDPR and other privacy regulations. Incident response and security contact information are not found, which could hinder timely reporting and resolution of security incidents. Overall, the security maturity is moderate but requires enhancements to meet best practices and regulatory compliance.

Recommendations

  1. Implement comprehensive privacy and cookie policies with clear consent mechanisms to improve privacy compliance.
  2. Add essential security headers (Content-Security-Policy, X-Frame-Options, X-Content-Type-Options) to enhance protection against web vulnerabilities.
  3. Publish clear contact information including security incident response contacts to improve trust and incident handling.
  4. Verify and update WHOIS domain registration information to ensure transparency and legitimacy.
  5. Conduct regular security audits and vulnerability assessments to maintain and improve security posture.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
无忧留学2025年专注英美澳加等10国留学申请服务，30年专业团队助力本科/硕士/博士升学，成功率98.7%。立即咨询获取个性化留学方案。
Key services
留学申请服务, 本科升学, 硕士升学, 博士升学, 签证指导, 移民留学, 升学指导
Content quality
good
Branding
consistent

Technology

Stack
Vue.js, Element UI, JavaScript
Frameworks
Vue.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS enabled

Analytics and tracking

Services
Baidu Analytics
Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
Baidu Analytics
Marketing tools
Meiqia customer service chat
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 detected.
  2. WHOIS data is missing, indicating possible recent registration or privacy protection.
  3. No explicit privacy, cookie, or terms of service policies found on the homepage HTML.
  4. No contact emails or phone numbers explicitly found in the HTML content provided.
  5. Website uses modern frontend technologies (Vue.js, Element UI).
  6. Tracking via Baidu Analytics and customer service chat via Meiqia detected.
  7. Content is focused on education consulting for overseas study in multiple countries.
  8. No adult or NSFW content detected.
  9. Security headers appear missing or not detected in provided data.
  10. SSL is enabled as site is HTTPS.
Technical notes

Notes

The website uses a modern JavaScript framework (Vue.js) and UI library (Element UI), indicating a contemporary frontend architecture. The site is served over HTTPS, which is a positive security indicator. Performance appears moderate based on resource preloading and script usage. Mobile optimization is good, with responsive design evident from viewport meta tags and rem-based font sizing. SEO is supported by meta description, keywords, and canonical link tags. However, accessibility features are basic and could be improved. Hosting provider details are not discernible from the provided data. No CMS is explicitly detected, suggesting a custom or SPA-based site. The site integrates third-party services such as Baidu Analytics and Meiqia chat for analytics and customer support respectively.
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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