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Security report for 51yuansu.com

杭州启觅网络科技有限公司 · Other · China

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

Security score

59/100

Risk levelMedium

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

觅元素 is a Chinese online platform specializing in providing high-quality free and commercial graphic design resources including PNG elements, high-definition backgrounds, and photography images. The site targets designers, marketers, and content creators seeking both free and premium licensed materials. It operates a freemium business model with VIP memberships offering commercial use rights and premium content access. The company behind the site is 杭州启觅网络科技有限公司, indicating a medium-sized enterprise with a strong market position in the Chinese digital design resource sector. Technically, the website employs a modern JavaScript stack including jQuery and Masonry.js, with moderate performance and basic mobile optimization. Security posture is good with HTTPS and some security headers, though improvements are recommended. Privacy policies and terms of service are present, but cookie consent mechanisms are lacking, which may impact compliance. Overall, the site is professional, content-rich, and trustworthy, though WHOIS data is missing, slightly reducing trust.

Scanned

This is an earlier scan of 51yuansu.com. View the latest report

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. 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 51yuansu.com

This scan found 26 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

€25per month

  • 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
60
DNS health
75
Network security
100
GDPR outside view
50
Average
59

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 holds a competitive advantage by offering a large volume of free and commercial graphic resources, supported by VIP subscription revenue. Its partnership ecosystem includes related image resource sites such as www.damaitu.com. The target customer segments are primarily creative professionals and businesses in need of design assets. Growth indicators include active content updates and multiple themed collections. The business model leverages freemium access with upsell to VIP memberships for commercial licensing. Strategic observations suggest focusing on enhancing privacy compliance and expanding mobile user experience to capture broader market share.

Security posture

The website demonstrates a moderate to good security maturity level with HTTPS enforced and a Content-Security-Policy header. Login forms incorporate CAPTCHA verification to mitigate automated abuse. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of additional security headers such as X-Frame-Options and Strict-Transport-Security, and lack of cookie security flags, represent areas for improvement. There is no public security policy or incident response information, which limits transparency. Compliance with GDPR and other privacy regulations is partial, mainly due to missing cookie consent mechanisms. Overall, the security posture is adequate but could be enhanced to reduce risk and improve user trust.

Recommendations

  1. Implement comprehensive cookie consent and tracking opt-in mechanisms to improve privacy compliance.
  2. Add additional HTTP security headers including X-Frame-Options, X-XSS-Protection, and Strict-Transport-Security.
  3. Set secure cookie flags (HttpOnly, Secure, SameSite) to protect session cookies.
  4. Publish a clear security policy and incident response contact information to enhance transparency.
  5. Improve mobile optimization and accessibility features to broaden user reach and compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
杭州启觅网络科技有限公司
Description
觅元素专注于提供高质量版权素材图片免费下载的网站，提供优质png素材、高清背景素材、图片素材、设计素材，找高质量版权素材就来觅元素.
Key services
free PNG elements, high-definition backgrounds, photography images, VIP membership for commercial licensing
Content quality
good
Branding
consistent

Technology

Stack
jQuery, ZeroClipboard, Masonry.js, flex-images, slideVerify.js, wxLogin.js
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Content-Security-Policy header present
  • CAPTCHA for login
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Baidu Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Baidu Analytics
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. WHOIS data is missing or unavailable, indicating possible privacy protection or recent registration.
  3. Site uses HTTPS with some security headers but could improve security posture.
  4. Privacy and terms policies are present and accessible in Chinese.
  5. No cookie consent mechanism detected, which may affect compliance.
  6. Contact email found in footer, but no explicit phone number or physical address detected.
  7. Site targets designers and marketers with free and premium graphic resources.
  8. Multiple external domains linked, mostly related to image hosting and partner sites.
  9. No adult or explicit content detected; content is safe for general audiences.
  10. Uses Baidu Analytics for tracking with moderate user tracking level.
Technical notes

Notes

The website uses a combination of jQuery, Masonry.js for layout, ZeroClipboard for clipboard interactions, and Baidu Analytics for user tracking. The HTML is well-structured with meta tags for SEO and mobile redirection. Performance is moderate with lazy loading images and asynchronous script loading. The site lacks a detected CMS, suggesting a custom or proprietary platform. Hosting provider details are not evident from the HTML. Accessibility and mobile responsiveness are basic but functional. Technical debt appears low, though modernization opportunities exist in adopting newer JavaScript frameworks and enhancing security headers.
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

Earlier scans of this domain

  1. 58/100Medium37 findingsView report
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