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Security report for tjbkn.com

大学生租房网 · Real Estate · China

High risk. 9 critical or high findings in Email security, Network security and 3 other checks.

Security score

48/100

Risk levelHigh

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

The website '大学生租房网' is a Chinese real estate platform primarily targeting university students and individual renters. It offers a comprehensive range of services including new house listings, second-hand property sales, rental information, and real estate news and guides. The platform appears to be positioned as a trustworthy and professional resource for personal housing needs in China, with a focus on no intermediary fees and detailed rental processes. Technically, the site uses the Destoon CMS platform with jQuery libraries and standard web technologies. The site is moderately optimized for mobile and SEO, with a clear navigation structure and regularly updated content. Security posture is basic, with HTTPS enabled but lacking advanced security headers and DNSSEC. Privacy compliance is limited, with no visible cookie consent mechanisms and only basic privacy and terms pages. The WHOIS data shows some inconsistencies, notably a domain creation date in the future, which reduces trust slightly. Overall, the site is functional and relevant for its target audience but would benefit from enhanced security and privacy 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. 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. 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

  3. 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';…

  4. 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 tjbkn.com

This scan found 25 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
72
Security headers
30
Email security
60
DNS health
75
Network security
0
GDPR outside view
50
Average
48

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 real estate sector within China, focusing on the rental and sales market for university students and individual consumers. Its business model revolves around providing an online platform for property listings and real estate information, likely generating revenue through advertising, listing fees, or premium services. The presence of multiple city subdomains indicates a broad geographic coverage strategy. The site maintains partnerships with various related service websites, enhancing its ecosystem. The company appears to be medium-sized with a focus on content quality and user engagement. However, the lack of explicit contact information and limited compliance features may impact user trust and regulatory adherence.

Security posture

The website demonstrates a basic security posture with HTTPS enabled and domain status protections in place. However, it lacks DNSSEC, security headers such as Content-Security-Policy, HSTS, and X-Frame-Options, which are important for mitigating common web attacks. No incident response or security policy information is publicly available, and no vulnerability disclosure or security.txt files are found. The absence of cookie consent mechanisms and limited privacy policy details suggest compliance gaps, particularly with GDPR and similar regulations. The WHOIS data anomaly regarding domain creation date raises questions about registration accuracy. Overall, the site should prioritize implementing modern security headers, DNSSEC, and transparent privacy and incident response policies to improve its security maturity.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Implement essential security headers including Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, and HSTS.
  3. Add a visible cookie consent banner and detailed cookie policy to improve privacy compliance.
  4. Publish clear contact information including company email and phone numbers to enhance trust and user support.
  5. Correct or clarify WHOIS domain registration data to resolve inconsistencies and improve legitimacy perception.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
大学生租房网
Description
大学生租房网,值得信赖的租房网站,为您提供个人租房,租房信息,房屋租赁,出租房源,房屋求租,合租房屋,仓库租赁,厂房租赁,商铺出租,写字楼出租信息,专业的房产中介及详细的租房流程,个人房源,无中介费是您租房的首选网站。
Key services
新房信息, 二手房交易, 房屋租赁, 房产百科资讯, 房产中介服务
Content quality
good
Branding
consistent

Technology

Stack
jQuery 1.5.2, jQuery 2.1.1, JavaScript, CSS, HTML5
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
good

Security

Observed score
55/100
Good practices seen
  • HTTPS enabled (implied by https URLs)
  • Domain status includes clientDeleteProhibited and clientTransferProhibited

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Tracking pixels
Baidu linksubmit push.js
Transparency
basic

Site quality

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

Key observations

  1. Website is a Chinese real estate rental and sales platform targeting university students and general users.
  2. Content is rich with listings for new houses, second-hand houses, rentals, and real estate news.
  3. No privacy or cookie consent banners detected, which may affect compliance.
  4. No explicit contact emails or phone numbers found on the main page or footer.
  5. Uses Destoon CMS platform, common in Chinese real estate websites.
  6. No advanced security headers or DNSSEC implemented.
  7. No signs of adult or unsafe content.
  8. Multiple city subdomains indicate broad geographic coverage within China.
  9. External links mostly to partner or related real estate and service sites.
Technical notes

Notes

The website is built on the Destoon CMS platform, utilizing jQuery versions 1.5.2 and 2.1.1, along with standard HTML5 and CSS stylesheets. The site loads external scripts from its own domain and Baidu's static resources for link submission. Mobile optimization is basic, with a mobile redirect meta tag and a mobile version URL. SEO is supported by meta keywords and description tags, and the site structure includes clear navigation menus and categorized content. Performance is moderate, with no explicit performance optimization scripts detected. Accessibility features are minimal but present. The site could benefit from modernization by updating jQuery to a single recent version, improving mobile responsiveness, and adding ARIA roles and accessibility enhancements.
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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