CVE-2026-92436
Received Received - Intake

Authentication Bypass in Mailchimp for WooCommerce Plugin

Publication date: 2026-09-27

Last updated on: 2026-09-27

Assigner: WPScan

Description
The Mailchimp for WooCommerce WordPress plugin before 6.3 does not require authentication or verify ownership before loading a saved cart from a request-supplied identifier that is derived from a customer's email address, allowing an unauthenticated attacker who knows a customer's email address to confirm that the customer shops at the store and to read that customer's saved cart contents.

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Meta Information

Published
2026-09-27
Last Modified
2026-09-27
Generated
2026-09-27
AI Q&A
2026-09-27
EPSS Evaluated
N/A
NVD
CVE-2026-92436
EUVD
EUVD-2026-87896

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mailchimp mailchimp_for_woocommerce to 6.3 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is an Insecure Direct Object Reference (IDOR) flaw in the Mailchimp for WooCommerce WordPress plugin before version 6.3. It allows unauthenticated attackers to access sensitive customer data by exploiting the lack of authentication and ownership verification when loading a saved cart using an email-derived identifier.

Detection Guidance

To detect this vulnerability, check if the Mailchimp for WooCommerce plugin version is below 6.3. You can use commands like 'wp plugin list' in WordPress or inspect the plugin files for version details. Additionally, monitor network traffic for unauthorized access attempts to cart endpoints.

Impact Analysis

An attacker who knows a customer's email address can confirm the customer shops at the store and view their saved cart contents without authentication. This exposes private shopping data and may lead to privacy breaches or targeted attacks.

Compliance Impact

This vulnerability likely violates GDPR and other privacy regulations by exposing personal data without consent. It compromises data integrity and confidentiality, potentially leading to legal penalties and reputational damage.

Mitigation Strategies

Immediately update the Mailchimp for WooCommerce plugin to version 6.3 or later. If updating is not possible, consider disabling the plugin temporarily until an update is applied. Review server logs for suspicious activity related to cart access.

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