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Security report for mercadolibre.com

MercadoLibre · E-commerce · N/a

Medium risk. 6 critical or high findings in Security headers and GDPR outside view.

Security score

75/100

Risk levelMedium

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

MercadoLibre operates as a leading e-commerce marketplace platform primarily targeting Spanish-speaking consumers across Latin America. The website offers a broad range of products with a focus on same-day free shipping, positioning itself as a major player in the regional online retail market. The business model centers on facilitating online transactions between buyers and sellers, leveraging localized country-specific domains to serve diverse markets. The company demonstrates strong brand consistency and trust signals through multiple domain verifications and Google integrations. From a technical perspective, the site employs common analytics tools such as Google Analytics and Google Tag Manager, alongside a proprietary Melidata analytics SDK for event tracking. Hosting is managed via Amazon AWS infrastructure, as inferred from DNS nameservers. However, the website suffers from poor SSL configuration with an invalid or missing certificate and no enabled TLS protocols, which severely undermines secure communications. Performance metrics indicate slow load times, and mobile optimization is basic, suggesting room for technical improvements. Security posture reveals critical vulnerabilities including invalid SSL certificates, lack of modern TLS support, absence of OCSP stapling, and malformed CAA DNS records. While HSTS is properly configured with preload and subdomain inclusion, the absence of DNSSEC and security policies on the site indicates gaps in domain and data protection. No privacy, cookie, or terms of service policies were found, nor any contact information for security or incident response, which could impact compliance and user trust. Overall, MercadoLibre's website reflects a mature e-commerce business with strong market presence but requires urgent remediation of security flaws and enhancement of privacy and compliance disclosures. Strategic improvements in SSL/TLS configuration, DNS security, and transparency around data protection would significantly reduce risk and improve user confidence.

Scanned

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

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
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 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 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

    • 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 mercadolibre.com

This scan found 14 issues across 5 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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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
100
Security headers
50
Email security
87
DNS health
90
Network security
100
GDPR outside view
25
Average
75

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

MercadoLibre holds a dominant position in the Latin American e-commerce sector, leveraging a marketplace model that connects millions of buyers and sellers. Its competitive advantage lies in localized country-specific platforms, extensive product offerings, and value-added services such as same-day free shipping. Revenue streams likely include transaction fees, advertising, and logistics services. The target customer segments are primarily Spanish-speaking consumers across multiple Latin American countries. The company maintains a broad partnership ecosystem, as evidenced by integrations with Google, Facebook, DocuSign, and other SaaS providers. Growth indicators include a large footprint across many countries and continuous investment in analytics and tracking technologies. Strategic observations suggest a focus on expanding market penetration and improving user engagement through data-driven insights.

Security posture

The current security maturity level of MercadoLibre's website is moderate but with critical vulnerabilities. The invalid SSL certificate and lack of TLS protocol support expose users to potential man-in-the-middle attacks and data interception. The absence of DNSSEC reduces domain name resolution security, and malformed CAA records may hinder proper certificate issuance controls. While HSTS is correctly implemented with preload, the lack of OCSP stapling and session resumption mechanisms limits TLS performance and reliability. No explicit privacy, cookie, or security policies were found, indicating compliance gaps with GDPR and other data protection regulations. Incident response readiness is unclear due to missing contact channels for security issues. The security culture appears to prioritize analytics and tracking but lacks transparency and robust cryptographic safeguards. Addressing these gaps is essential to protect user data and maintain regulatory compliance.

Recommendations

  1. Fix and properly configure SSL/TLS certificates to ensure validity and enable TLS 1.2 and 1.3 protocols.
  2. Enable DNSSEC and correct CAA DNS records to strengthen domain security and certificate issuance controls.
  3. Publish comprehensive privacy, cookie, and terms of service policies to improve transparency and compliance.
  4. Implement OCSP stapling and session resumption to enhance TLS performance and security.
  5. Establish clear incident response contact channels and security policies to improve security posture and user trust.
Technical notes

Notes

The website is hosted on Amazon AWS infrastructure with DNS managed by AWS Route 53. It uses Google Analytics, Google Tag Manager, and a proprietary Melidata SDK for analytics and event tracking. The site employs standard HTML5 and CSS with responsive design elements but shows slow performance with a 23.4-second load time and moderate page size. Mobile optimization and accessibility are basic, indicating potential for improvement. The absence of a CMS or specific frameworks was detected. Security configurations are weak due to invalid SSL certificates and disabled TLS protocols. The technical debt includes outdated or missing cryptographic configurations and lack of DNS security enhancements. Modernization opportunities include upgrading SSL/TLS, enabling DNSSEC, improving performance, and enhancing privacy compliance mechanisms.
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. 73/100Medium26 findingsView report
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