# CVE-2026-92435: Mailchimp for WooCommerce missing authorization in REST API

Source: https://junglewise.ai/threats/cve-2026-92435-the-mailchimp-for-woocommerce-wordpress-plugin-before-6-1-1-does  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-19. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-92435 · Severity: medium · CVSS 5.3 · Published 2026-09-19

The Mailchimp for WooCommerce WordPress plugin fails to properly verify user permissions on several REST API endpoints, allowing unauthenticated attackers to access administrator functions and make persistent changes to store configuration. This could enable unauthorized modifications to email marketing settings, customer data, or other critical store parameters without authentication.

Technologies: [Mailchimp for WooCommerce](https://junglewise.ai/threats/technologies/mailchimp-for-woocommerce). Vendors: [Mailchimp](https://junglewise.ai/threats/vendors/mailchimp).

## Quick answers

**Is CVE-2026-92435 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-92435 being exploited in the wild.

**How severe is CVE-2026-92435?** Medium severity, with a CVSS score of 5.3, published 19 September 2026.

**Which products and versions are affected?** Mailchimp for WooCommerce before 6.1.1.

**Is there a fix for CVE-2026-92435?** A patch was published on 2026-09-19: Fixed in version 6.1.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-92435 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-92435?** Check whether you run Mailchimp for WooCommerce at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A broken access control vulnerability (CWE-862) in the REST API permission callbacks allows unauthenticated requests to reach admin-oriented endpoints. The plugin does not verify the required capabilities before processing requests on multiple API routes, enabling an attacker with network access to trigger persistent state changes without prior authentication.

## Affected products

- Mailchimp Mailchimp for WooCommerce before 6.1.1

## Timeline

- 2026-09-17: disclosed
- 2026-09-19: patched: Fixed in version 6.1.1

## References

- [https://wpscan.com/vulnerability/4b3f9c83-8986-40d9-ab1a-848550ea7882/](https://wpscan.com/vulnerability/4b3f9c83-8986-40d9-ab1a-848550ea7882/)

## Related threats

- [Mailchimp for WooCommerce unauthenticated abandoned cart modification](https://junglewise.ai/threats/cve-2026-92437-the-mailchimp-for-woocommerce-wordpress-plugin-before-6-3-does)
- [Mailchimp for WooCommerce IDOR in saved cart loading](https://junglewise.ai/threats/cve-2026-92436-the-mailchimp-for-woocommerce-wordpress-plugin-before-6-3-does)