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Security report for tengzhei.com

星沙英语网 · Education · China

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

Security score

60/100

Risk levelMedium

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

星沙英语网 is a Chinese online educational platform focused on English language learning, offering a variety of resources including listening classes, speaking training, vocabulary, phonetics, business English, and exam preparation materials. The site also lists multiple English training institutions and courses, targeting learners from beginners to advanced students preparing for exams like CET-4/6, IELTS, and TOEFL. The platform positions itself as a niche educational resource within the Chinese market, catering primarily to Chinese learners of English. Technically, the website uses Bootstrap and jQuery, hosted by Alibaba Cloud, and is mobile-optimized with a moderate performance profile. However, it lacks advanced security headers and cookie consent mechanisms, which are areas for improvement. The domain is newly registered in 2023 and is consistent with the business profile. Security posture is basic with no detected WAF or blocking mechanisms, but DNSSEC is not enabled and no incident response or security policy pages are present.

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 tengzhei.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.

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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
100
GDPR outside view
50
Average
60

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 tengzhei.com, from OffSeq Breach.

No leaked records found

Breach holds no records for tengzhei.com 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

The business operates as a small-sized educational content provider in China, focusing on English language learning. Its revenue model likely includes advertising, partnerships with training institutions, and possibly course referrals. The website features multiple subdomains for regional city sites and partner schools, indicating a networked approach to local market penetration. The presence of an ICP license shows regulatory compliance in China. The business targets a broad audience of English learners, including students and professionals. The lack of social media presence and limited contact information suggest a modest digital marketing footprint. The partnership ecosystem includes several affiliated training schools hosted on subdomains.

Security posture

The website demonstrates a basic security posture with HTTPS implied but not confirmed due to lack of headers data. DNSSEC is not enabled, which is a missed opportunity for domain security enhancement. No security headers such as Content-Security-Policy or X-Frame-Options are detected, increasing risk exposure. There is no visible security policy or incident response contact information, indicating limited preparedness for security incidents. No vulnerable libraries were identified, but the use of older jQuery versions could pose risks if not updated. Overall, the security maturity is low to moderate, suitable for a small educational site but requiring improvements to meet higher compliance standards.

Recommendations

  1. Enable DNSSEC to protect against DNS spoofing and improve domain security.
  2. Implement and enforce HTTPS with HSTS to ensure secure communications.
  3. Add standard security headers (Content-Security-Policy, X-Content-Type-Options, X-Frame-Options) to mitigate common web attacks.
  4. Introduce a cookie consent banner and cookie policy to comply with privacy regulations.
  5. Publish a dedicated security policy and incident response contact to improve transparency and readiness.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
星沙英语网
Description
星沙英语网,零基础在线学习英语网站,提供英语听力课堂、英语口语培训、英语单词、英语音标、英语发音、商务英语、大学英语、英语四六级、新概念英语、雅思托福英语等在线英语学习。
Key services
English listening classes, English speaking training, English vocabulary and phonetics, Business English, Exam preparation (CET-4/6, IELTS, TOEFL), Listing of English training institutions and courses
Content quality
good
Branding
consistent

Technology

Stack
Bootstrap, jQuery
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
40/100

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
moderate

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is primarily in Chinese targeting English learners in China.
  3. No privacy or cookie policy banner detected, indicating potential compliance gaps.
  4. No security headers or advanced security policies detected.
  5. WHOIS data is transparent and consistent with the website.
  6. No social media links found on the site.
  7. Contact information is limited but present (email and phone).
  8. No forms detected in the HTML content.
  9. Site uses Bootstrap and jQuery for frontend.
  10. Multiple subdomains for regional city sites and partner training schools.
Technical notes

Notes

The website uses a classic frontend stack with Bootstrap and jQuery, which provides responsive design and basic interactivity. The HTML structure is valid and includes meta tags for SEO and viewport settings for mobile optimization. The site performance is moderate, with no explicit performance optimization scripts detected. Accessibility features are basic, with no ARIA roles or landmarks identified. The hosting provider is Alibaba Cloud, a reputable service. The site lacks modern CMS indicators, suggesting a custom or lightweight CMS solution. There is room for modernization by adopting newer JavaScript frameworks and improving accessibility compliance.
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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