MC4WP: Mailchimp Top Bar – Email Subscribe Notification Bar

MC4WP: Mailchimp Top Bar – Email Subscribe Notification Bar has one disclosed vulnerability in the WordSec catalog, all reported in 2024; it is fixed as of September 2026. Their average CVSS score is 6.1, and the most serious one scores 6.1 out of 10.

The most common weakness is Cross-Site Scripting, behind 1 of the records (100%).

The one issue recorded for MC4WP: Mailchimp Top Bar – Email Subscribe Notification Bar has a vendor fix available, so running the current release closes it.

All of these findings were reported by vgo0. MC4WP: Mailchimp Top Bar – Email Subscribe Notification Bar is installed on roughly 6,000 WordPress sites, so each unpatched flaw has a wide blast radius. The current release is tested up to WordPress 7.1.

Strategic Overview

Avg CVSSMedium

6.1/ 10

Patch Coverage100%

Open

Fixed

Get automatic notifications for all MC4WP: Mailchimp Top Bar – Email Subscribe Notification Bar vulnerabilities before they are exploited.

Highest severity on recordCVSS 6.1CVE-2024-9210

MC4WP: Mailchimp Top Bar <= 1.6.0 - Reflected Cross-Site Scripting

Read the full analysis

Vulnerability Records

1 records


2024-10-01 00:00	MC4WP: Mailchimp Top Bar <= 1.6.0 - Reflected Cross-Site Scripting MC4WP: Mailchimp Top Bar <= 1.6.0	`CVE-2024-9210`	6.1 Medium	vgo0	Yes

Showing 1–1 of 1 reports

Latestv1.7.7

MC4WP: Mailchimp Top Bar – Email Subscribe Notification Bar

Author

Danny van Kooten

4.6(31)

92/100

Last Updated

2026-08-20 (24d ago)

Active Installs

6,000+

Downloads

385,655

Requires WP

4.9+

Requires PHP

7.4+

Tested up to

WP 7.1

Created

2015-01-28 (12y ago)

Requires Plugins

mailchimp-for-wp

Grow your Mailchimp audience with a customizable email signup bar at the top or bottom of your WordPress site. The bar stays visible while visitors browse, helping your call to action get noticed without blocking your content. Mailchimp Top Bar is an add-on for MC4WP: Mailchimp for WordPress. It connects the bar to the Mailchimp audience of your choice. Features Capture more subscribers: Keep your email signup call to action visible while visitors browse. Match your brand: Customize the bar text, button text, and colors from the plugin settings. Choose its position: Display the subscribe bar at the top or bottom of the screen. Let visitors dismiss it: Visitors can hide the bar when they are not interested. Keep pages fast: The front-end JavaScript is under 2 kB when compressed. About the Plugin Author Danny van Kooten has been building WordPress plugins since 2010, starting with WordPress 3.0. He is the founder of ibericode, the small software company behind popular WordPress plugins including Mailchimp for WordPress, Boxzilla Pop-ups and Koko Analytics.

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