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CVE-2026-49066 – Unauthenticated Sensitive Data Exposure – Conekta Payment Gateway WordPress Plug…

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Summary

CVE-2026-49066 is a high-severity unauthenticated sensitive data exposure vulnerability affecting the Conekta Payment Gateway WordPress plugin (by Conekta Group), versions 6.0.0 and earlier. The flaw allows a remote, unauthenticated attacker to access sensitive information with no user interaction required, and carries a CVSS 3.1 base score of 7.5 (HIGH). A patched release (version 6.0.1) has been issued by the vendor, and upgrading is strongly recommended.

Technical details

  • Root cause: Classified as CWE-497 (Exposure of Sensitive System Information to an Unauthorized Control Sphere), the vulnerability resides in the plugin’s checkout integration, which was substantially overhauled in version 6.0.0. That release introduced a new server-side REST endpoint (POST /conekta/v1/checkout-request) responsible for pre-creating Conekta payment orders at checkout iframe-mount time, along with a reorganized data-localization layer that passes configuration values from PHP to JavaScript. The security fix released in version 6.0.1 explicitly addresses a flaw within this checkout integration.
  • Trigger conditions: Exploitation follows the CAPEC-37 pattern (Retrieving Embedded Sensitive Data) — an unauthenticated remote attacker can trigger the exposure directly over the network with no prerequisites.
  • Attack vector: Network (AV:N); low attack complexity (AC:L); no privileges required (PR:N); no user interaction needed (UI:N).
  • Impact: High confidentiality impact (C:H) — sensitive data handled by the payment gateway integration is accessible to unauthorized parties. No integrity or availability impact is indicated by the CVSS vector.

Affected software

  • Conekta Payment Gateway (WordPress/WooCommerce plugin by Conekta Group) — all versions ≤ 6.0.0

Severity

CVSS v3.1 Base Score: 7.5 (HIGH)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Mitigation and recommended actions

  • Immediate: Update to version 6.0.1 or later. The vendor’s official changelog for version 6.0.1 states: "Security fix in the checkout integration. Updating is strongly recommended." The current latest release is version 6.0.3, available from the WordPress.org plugin repository.
  • If immediate patching is not possible: Temporarily deactivate the Conekta Payment Gateway plugin and redirect customers to an alternative checkout method until the update can be applied. Additionally, restrict REST API access at the web server or WAF level to limit unauthenticated access to plugin endpoints.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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