CVE-2026-8151

MEDIUM 5.4

Simple Membership MailChimp Integration < 1.9.8 - API Key Update via CSRF

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	unknown
Product	simple membership mailchimp integration
Published	Sep 2, 2026
Last Updated	Sep 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Unknown / Simple Membership MailChimp Integration

0 < 1.9.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wpscan.com: https://wpscan.com/vulnerability/c7002cf8-83db-4e1f-a6e9-230293290635/ plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/simple-membership-mailchimp-integration/trunk/swpm-mailchimp-admin-menu.php#L12

Credits

Mustafa Ahmed WPScan