CVE-2026-8151
Received Received - Intake

Simple Membership MailChimp Integration CSRF Vulnerability

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: WPScan

Description
The Simple Membership MailChimp Integration WordPress plugin before 1.9.8 does not have CSRF checks in its settings page, allowing attackers to trick a logged-in administrator into changing the configured third-party API key. Once replaced, all subsequent member registration data (name, email, membership level) is sent to the attacker-controlled account.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-02
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-8151
EUVD
EUVD-2026-70043

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
simple_membership mailchimp_integration to 1.9.8 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-352 The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

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Executive Summary

This vulnerability is a Cross-Site Request Forgery (CSRF) flaw in the Simple Membership MailChimp Integration WordPress plugin before version 1.9.8. It allows attackers to trick a logged-in administrator into changing the MailChimp API key to one controlled by the attacker. This causes all member registration data to be sent to the attacker's account.

Detection Guidance

Check if the Simple Membership MailChimp Integration plugin is installed and verify its version. If it is below 1.9.8, the system is vulnerable. Use WordPress admin panel or run a command like 'wp plugin list' if using WP-CLI to check versions.

Impact Analysis

If you are a WordPress administrator using this plugin, an attacker could steal member registration data including names, emails, and membership levels. This could lead to data breaches, unauthorized access to user information, and potential misuse of the data.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR and HIPAA due to unauthorized access and potential exposure of personal data. GDPR requires protecting personal data, and HIPAA mandates safeguarding health-related information. A breach could result in legal penalties and reputational damage.

Mitigation Strategies

Update the Simple Membership MailChimp Integration plugin to version 1.9.8 or later immediately. Review the MailChimp API key settings to ensure it hasn't been changed by an attacker. Consider disabling the plugin if not in use.

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