EUVD-2026-70043
GHSA-jj57-hm9m-766c
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Network-delivered CSRF requiring active admin interaction (UI:R); C:L and I:L reflect ongoing PII leakage and API key modification without availability impact.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Cross-site request forgery in the Simple Membership MailChimp Integration WordPress plugin (versions before 1.9.8) allows a network-positioned attacker to replace the site's configured MailChimp API key with one under attacker control by tricking a logged-in administrator into loading a crafted page. Once the API key is substituted, all subsequent member registration data - including name, email address, and membership level - is silently forwarded to the attacker's MailChimp account until the change is detected. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a logged-in WordPress administrator to visit an attacker-controlled web page while their WordPress admin session is active in the same browser. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.4 Medium score (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N) accurately reflects the social-engineering dependency (UI:R) and bounded impact (C:L/I:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Update the Simple Membership MailChimp Integration plugin to version 1.9.8 or later; the Trac commit at https://plugins.trac.wordpress.org/browser/simple-membership-mailchimp-integration/trunk/swpm-mailchimp-admin-menu.php#L12 confirms the addition of CSRF nonce verification to the settings page. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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