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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.001 (2.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Simple Membership Mailchimp Integration
Weakness classification (CWE)
References
- wpscan.com/vulnerability/c7002cf8-83db-4e1f-a6e9-230293290635/ (technical-description, exploit, vdb-entry)
- plugins.trac.wordpress.org/browser/simple-membership-mailchimp-integration/trun… (patch)
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.