The MC4WP: Mailchimp for WordPress plugin before 4.15.0 does not validate that the Mailchimp audience a sign-up form or bundled integration subscribes a visitor to matches the audience configured by the site owner, allowing unauthenticated visitors to subscribe arbitrary email addresses to any other audience in the site's connected Mailchimp account.
History

Fri, 06 Nov 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Fri, 06 Nov 2026 12:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-863
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}


Fri, 06 Nov 2026 08:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Fri, 06 Nov 2026 06:15:00 +0000

Type Values Removed Values Added
Description The MC4WP: Mailchimp for WordPress plugin before 4.15.0 does not validate that the Mailchimp audience a sign-up form or bundled integration subscribes a visitor to matches the audience configured by the site owner, allowing unauthenticated visitors to subscribe arbitrary email addresses to any other audience in the site's connected Mailchimp account.
Title MC4WP: Mailchimp for WordPress < 4.15.0 - Unauthenticated Subscription Audience Override
References

cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published: 2026-11-06T06:00:28.080Z

Updated: 2026-11-06T11:59:40.340Z

Reserved: 2026-10-27T17:49:16.686Z

Link: CVE-2026-118167

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-06T06:16:40.710

Modified: 2026-11-06T12:17:17.967

Link: CVE-2026-118167

cve-icon Redhat

No data.