Known vulnerabilities in MC4WP: Mailchimp Top Bar – Email Subscribe Notification Bar

Add a customizable Mailchimp top bar that turns WordPress visitors into email subscribers without interrupting their browsing.

1Reported vulnerabilities

6.1Highest CVSS score

1.7.6Latest version

6,000+Active installs

What to do now

Update MC4WP: Mailchimp Top Bar – Email Subscribe Notification Bar to 1.6.1 or later. 1 of these have a fixed version available. Updating resolves them.

Plugin last updated: June 24, 2026 / Tested up to WordPress: 7.0.4 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2024-9210	Medium 6.1	0.4%	Before 1.6.1	`1.6.1`	October 2, 2024

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.