CSRF in Simple Membership Mailchimp Integration

CVE-2026-8151

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.

Vulnerability class: CSRF (Cross-Site Request Forgery)

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

  • Unknown Simple Membership Mailchimp Integration

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-8151?
CVE-2026-8151 is a medium-severity vulnerability in Simple Membership Mailchimp Integration, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.4/10. Published 2026-09-02.
How severe is CVE-2026-8151?
Medium severity. CVSS v3 base score is 5.4 out of 10.