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Security report for sizzlejs.com

jQuery · Technology · N/a

Medium risk. 3 critical or high findings in GDPR outside view and SSL/TLS.

Security score

68/100

Risk levelMedium

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

The website is a GitHub-hosted wiki page for the jQuery Sizzle project, a widely used open source JavaScript selector engine. It serves developers and software engineers interested in JavaScript and front-end development. The project is well-established with a domain age dating back to 2007, hosted on GitHub, and enjoys a strong community presence as indicated by its star and fork counts. The business model revolves around open source collaboration and code sharing rather than direct commercial services. Technically, the site leverages modern web technologies including React and GitHub's Primer CSS framework, ensuring good performance, mobile optimization, and accessibility. Hosting on GitHub provides robust infrastructure and excellent SSL/TLS security. However, DNSSEC is not enabled, and explicit security headers are not visible in the provided data, suggesting minor areas for improvement. From a security perspective, the site benefits from GitHub's platform security and domain registration protections but lacks explicit published security policies, vulnerability disclosure mechanisms, or incident response contacts. Privacy compliance is minimal with no visible privacy or cookie policies on the wiki page, which is common for GitHub-hosted project pages but represents a compliance gap. Overall, the site is trustworthy, professional, and safe for general audiences, with no adult or questionable content. The main risks relate to privacy policy absence and lack of explicit security documentation. Strategic recommendations include publishing privacy and cookie policies, enabling DNSSEC, and providing security and incident response information to enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
73/ 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

3 findings rated critical or high. Fix these first.

  1. 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

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1
    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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  • TLS certificates and expiry
  • DNS records
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  • 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
47
Security headers
75
Email security
80
DNS health
90
Network security
40
GDPR outside view
73
Average
68

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 jQuery Sizzle project is positioned as a key open source technology within the JavaScript ecosystem, maintained under the jQuery organization on GitHub. Its competitive advantage lies in its longevity, community support, and integration with jQuery and other frameworks. The business model is community-driven open source development, with indirect revenue streams likely through GitHub sponsorships and related services. The target customers are developers and organizations using JavaScript for web development. Growth indicators include high star and fork counts and active issue and pull request management. The project benefits from GitHub's ecosystem and partnerships but does not have direct commercial subsidiaries or partners listed on this page.

Security posture

The security posture is solid due to GitHub's platform protections, HTTPS enforcement, and domain registration safeguards. However, the absence of DNSSEC and explicit security headers reduces defense in depth. No vulnerabilities or exposed sensitive data were detected in the content. The lack of published security policies and incident response contacts limits transparency and preparedness. Compliance with GDPR and other regulations is unclear due to missing privacy and cookie policies. The site does not appear to collect personal data directly on this wiki page, reducing immediate privacy risks. Overall, security maturity is moderate with room for improvement in documentation and DNS security.

Recommendations

  1. Publish a clear and comprehensive privacy policy and cookie policy on the project or organization website.
  2. Enable DNSSEC for the domain to enhance DNS security and prevent spoofing.
  3. Add explicit security headers such as Content-Security-Policy, X-Content-Type-Options, and Strict-Transport-Security.
  4. Provide a publicly accessible security policy and vulnerability disclosure program, including contact channels for incident response.
  5. Regularly audit and update third-party dependencies to avoid vulnerable libraries and ensure secure forms and inputs.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
jQuery
Description
A sizzlin' hot selector engine. Contribute to jquery/sizzle development by creating an account on GitHub.
Key services
Open source JavaScript selector engine development, Community collaboration, Code hosting and version control
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, React, Turbo, GitHub Pages, Primer CSS
Frameworks
React
Platforms
GitHub
Performance
fast
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced via GitHub
  • Domain status includes clientDeleteProhibited, clientTransferProhibited, clientUpdateProhibited

Analytics and tracking

Services
GitHub internal analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is a GitHub-hosted open source project wiki for the jQuery Sizzle selector engine.
  2. No explicit privacy, cookie, or terms of service policies found on this wiki page.
  3. No direct contact emails or phone numbers found in the content.
  4. Website uses modern web technologies including React and GitHub's Primer CSS.
  5. HTTPS is enforced with excellent SSL configuration.
  6. No DNSSEC enabled, which is a minor security gap.
  7. No visible security.txt or vulnerability disclosure policy.
  8. No advertising or tracking networks detected beyond GitHub's internal analytics.
  9. Content is technical, safe, and targeted at developers.
  10. No WAF or blocking mechanisms detected; content fully accessible.
Technical notes

Notes

The website uses a modern tech stack centered around React and GitHub's Primer CSS framework, hosted on GitHub's infrastructure. Performance is optimized with fast loading times and mobile responsiveness. Accessibility features are implemented, including keyboard navigation and ARIA attributes. SEO is supported by proper meta tags and Open Graph data. The site uses multiple external domains for assets and content delivery, all reputable and related to GitHub. No CMS beyond GitHub's platform is detected. The technical debt appears low, but enabling DNSSEC and adding security headers would strengthen the infrastructure. The site is well-maintained with active community engagement.
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. 68/100Medium27 findingsView report
  2. 68/100Medium26 findingsView report
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