The mailchimp-for-wp plugin before 4.1.8 for WordPress has XSS via the return value of add_query_arg.
https://wordpress.org/plugins/mailchimp-for-wp/#developers
Source: Mitre, NVD
Published: 2019-08-22
Updated: 2026-06-17
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.00288