CVE-2026-118166

MediumCVSS 4.8/10Last modified Nov 6, 2026

Description

The MC4WP: Mailchimp for WordPress WordPress plugin before 4.15.0 does not prevent request-derived values in its dynamic content tags from being processed as shortcodes when a form is embedded with its block, allowing unauthenticated visitors to execute arbitrary registered shortcodes with attacker-chosen attributes. This requires the site owner to have added a request-derived tag to the form content and to embed the form with the block rather than the classic shortcode.

Metrics

CVSS 3.1 4.8/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-74

Affected software

Vendor	Product	Versions
Unknown	MC4WP: Mailchimp for WordPress	< 4.15.0

References

https://wpscan.com/vulnerability/a8b2a564-25ae-4ed8-9c2c-989b104ba4c8/

Timeline

Published: Nov 6, 2026
Last modified: Nov 6, 2026
NVD status: Deferred

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