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Security report for 51job.com

前程无忧 · Technology · China

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

64/100

Risk levelMedium

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

51job.com is a leading Chinese online job recruitment platform established in 1999, offering comprehensive human resource services including job listings, talent recruitment, training, and employer advertising. The website targets job seekers and employers across China, providing a broad range of employment-related services. The platform is well-established with a strong market position and a large user base. Technically, the site employs modern JavaScript frameworks, including Vue.js, and uses ES6 modules and polyfills to ensure compatibility. Hosting is provided by Alibaba Cloud, a reputable provider, and the site uses HTTPS with good SSL configuration. Security headers are present, though DNSSEC is not enabled, representing a minor security gap. Privacy and terms of service policies are clearly linked and comprehensive, though no cookie consent mechanism was detected, which may impact privacy compliance. Advertising is transparent and well integrated, with Baidu Analytics used for tracking. Overall, the site is professional, trustworthy, and technically sound, with minor areas for improvement in privacy compliance and DNS security.

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

6 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 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';…

  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

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

Keep watching 51job.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.

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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
67
Security headers
35
Email security
70
DNS health
60
Network security
100
GDPR outside view
53
Average
64

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

51job.com operates in the technology and education sectors, focusing on online recruitment and HR services. Its business model revolves around providing a platform for job seekers and employers to connect, supplemented by advertising and training services. The company has a long history and a strong brand presence in China. The website features numerous advertisements from reputable companies, indicating a robust partnership ecosystem. The platform's extensive job listings and specialized sections for campus recruitment and corporate hiring demonstrate a diversified service offering. The site’s market position as a leading recruitment portal in China is supported by its domain age and consistent branding. Growth indicators include active advertising campaigns and partnerships with major corporations. The platform’s business intelligence suggests a mature, stable operation with a focus on expanding digital HR services.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and good SSL configuration. Security headers are present, contributing to protection against common web vulnerabilities. No exposed sensitive data or vulnerable libraries were detected in the analyzed content. However, the absence of DNSSEC reduces DNS security robustness. There is no publicly available security policy or incident response information, which could hinder transparency and user trust in security matters. The lack of a vulnerability disclosure program or security.txt file suggests limited formal channels for reporting security issues. Overall, the security posture is strong but could be enhanced by adopting DNSSEC, publishing security policies, and establishing vulnerability disclosure mechanisms.

Recommendations

  1. Enable DNSSEC to improve DNS security and prevent spoofing attacks.
  2. Implement a cookie consent banner to comply with privacy regulations and enhance user trust.
  3. Publish a detailed security policy and incident response plan accessible to users.
  4. Establish a vulnerability disclosure program or security.txt file to facilitate responsible reporting of security issues.
  5. Regularly audit third-party scripts and libraries to ensure no vulnerabilities are introduced.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
前程无忧
Description
前程无忧人才网面向全国,提供2025准确的招聘网站信息,为企业和求职者提供人才招聘、求职、找工作、培训等在内的全方位的人力资源服务,更多求职找工作信息尽在前程无忧!
Key services
Job listings, Talent recruitment, Job search, Training services, Employer advertising
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, ES6 Modules, Polyfills, Baidu Analytics
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No DNSSEC (not enabled)
  • No exposed sensitive data found in HTML

Analytics and tracking

Services
Baidu Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
51job internal ad system
Tracking pixels
Baidu Analytics
Marketing tools
Custom advertisement banners, Carousel ads
Transparency
good

Site quality

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

Key observations

  1. Website is a mature, professional job recruitment platform targeting the Chinese market.
  2. Content is primarily in Chinese with comprehensive job listings and employer advertisements.
  3. No signs of malicious or suspicious content detected.
  4. Privacy and terms policies are present and linked clearly.
  5. No explicit contact emails or phone numbers found on the homepage content.
  6. Uses modern JavaScript frameworks and modules, indicating up-to-date technical implementation.
  7. No DNSSEC enabled, which is a minor security improvement opportunity.
  8. No cookie consent banner detected, which may affect compliance with privacy regulations.
  9. Advertising is transparent and clearly marked.
  10. No WAF or blocking mechanisms detected; site fully accessible.
Technical notes

Notes

The website uses modern web technologies including ES6 JavaScript modules, polyfills for compatibility, and Vue.js framework components. Hosting is managed by Alibaba Cloud, ensuring reliable infrastructure. The site loads multiple external scripts and images from 51job-owned CDN domains, optimizing performance. Baidu Analytics is integrated for user tracking. The site is mobile-optimized with responsive design elements and clear navigation. SEO is well addressed with meta tags, keywords, and structured navigation links. Accessibility features are basic but present. Performance is moderate, with potential for improvement in load times and resource optimization. No CMS was explicitly detected, suggesting a custom or proprietary platform. Overall, the technical implementation is modern and robust, supporting a large-scale recruitment platform.
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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