MC4WP · Version history
MC4WP changelog and version history
- Latest version
- 4.15.0
- Nov 3, 2026 (6 days ago)
- Releases
- 209
- since 2013
- In the last year
- 16
- about one every 23 days
- Tested up to
- WordPress 7.1.4
- PHP 7.4 or later
Releases each year
- 201317 releases
- 201422 releases
- 201536 releases
- 201628 releases
- 201716 releases
- 201811 releases
- 201916 releases
- 20206 releases
- 20215 releases
- 20226 releases
- 202311 releases
- 202410 releases
- 202511 releases
- 202614 releases
202614 releases
MC4WP 4.15.0Latest
- Release date: Nov 3, 2026
- Security: Only accept lists from the _mc4wp_lists request parameter when the site owner chose them for that form or integration. A visitor could otherwise subscribe an email address to any audience in the connected Mailchimp account. Thanks to Harry Nguyen and Karthik Ramakrishnan for reporting thi…
- Security: Encode square brackets in the values of dynamic content tags, so that a value like {data key="..."} can not run a shortcode when the form is shown with the form block. Thanks to Jakub Herman for reporting this.
- Security: URL-encode the IDs in all Mailchimp API resource paths.
- Security: Ignore submissions to sign-up forms that are not published.
- Security: Escape the Contact Form 7 form title in the admin.
- Compatibility: Custom HTML that sends _mc4wp_lists to an integration now only works for lists that are selected in the settings of that integration. List choice fields can no longer be added to a form through the mc4wp_form_content filter; add them to the form content instead. Pages that were cache…
- Forms & Integrations: New “Update only empty fields?” setting. When updating an existing subscriber, it keeps the field values that are already set in Mailchimp and only fills in empty fields. Thanks arnelap!
- Misc: Fix a fatal error when the data for a Mailchimp API request can not be encoded as JSON. The request now fails with an error instead. Thanks Robert Staddon!
- Misc: The WPML code snippets now also work with language codes that include a country, like en-us. Thanks arnelap!
- Misc: Bump tested WordPress version to 7.1.
MC4WP 4.14.1
- Release date: Sep 10, 2026
- Security: Escape dynamic content tags based on where they appear in the HTML. Values in URL attributes can no longer use a protocol like javascript:, and values in event handler attributes are removed.
- Integrations: Prosopo Procaptcha now follows the alignment of the surrounding form. Thanks Chris Taylor!
- Integrations: Fix Prosopo Procaptcha breaking other scripts on the page when the theme wraps the form in paragraph tags. Thanks Chris Taylor!
- Misc: Fix the Mailchimp Site Tracking Pixel not finding an already connected site for the same domain, for example when it was registered with a www. prefix or on a multisite subdirectory install.
- Misc: Log the full Mailchimp error message when the Site Tracking Pixel fails to connect.
MC4WP 4.14.0
- Release date: Aug 4, 2026
- Integrations: Show the sign-up checkbox on the admin “Add New User” form. Thanks arnelap!
- Misc: Add a code snippet for sending the WordPress username to Mailchimp with User Sync.
- Misc: Update WordPress Coding Standards to 3.4 and fix a few incorrect type annotations.
MC4WP 4.13.1
- Release date: Jun 22, 2026
- Forms: Improve handling of pasted <form> wrapper tags in form content.
- Forms: Remove mc4wp_default_form_id option. We now default to first available form.
- Forms: Improve the {email} dynamic content tag by detecting common lowercase email field names.
- Misc: Adhere to DB, Security, I18n sniffs from WordPress Coding Standards.
- Misc: Prevent direct access to plugin configuration files.
- Misc: Remove the plugin review request from the footer of plugin admin pages.
- Security: Add Patchstack vulnerability disclosure instructions to the plugin FAQ and security policy.
MC4WP 4.13.0
- Release date: Jun 1, 2026
- Improve performance by preloading core plugin classes and skipping dynamic content tag parsing when no tags are present.
- Improve security for admin AJAX requests by adding a nonce check and stricter audience ID handling.
- Improve dynamic content tag replacement by removing broken regular expressions.
- Improve form preview output by disabling PHP error display during preview rendering.
- Update JavaScript dependencies and pass admin script data using wp_add_inline_script().
- View the full changelog on GitHub
MC4WP 4.12.6
MC4WP 4.12.5
MC4WP 4.12.4
MC4WP 4.12.3
MC4WP 4.12.2
MC4WP 4.12.1
MC4WP 4.12.0
MC4WP 4.11.1
MC4WP 4.11.0
202511 releases
MC4WP 4.10.9
MC4WP 4.9.21
MC4WP 4.10.8
MC4WP 4.10.7
MC4WP 4.10.6
MC4WP 4.10.5
MC4WP 4.10.4
MC4WP 4.10.3
MC4WP 4.10.2
MC4WP 4.10.1
MC4WP 4.10.0
202410 releases
MC4WP 4.9.20
MC4WP 4.9.19
MC4WP 4.9.18
MC4WP 4.9.17
MC4WP 4.9.16
MC4WP 4.9.15
MC4WP 4.9.14
MC4WP 4.9.13
MC4WP 4.9.12
MC4WP 4.9.11
202311 releases
MC4WP 4.9.10
MC4WP 4.9.9
MC4WP 4.9.8
MC4WP 4.9.7
MC4WP 4.9.6
MC4WP 4.9.5
MC4WP 4.9.4
MC4WP 4.9.3
MC4WP 4.9.2
MC4WP 4.9.1
MC4WP 4.9.0
20226 releases
MC4WP 4.8.12
MC4WP 4.8.11
MC4WP 4.8.10
MC4WP 4.8.9
MC4WP 4.8.8
MC4WP 4.8.7
20215 releases
MC4WP 4.8.6
MC4WP 4.8.5
MC4WP 4.8.4
MC4WP 4.8.3
MC4WP 4.8.2
20206 releases
MC4WP 4.8.1
MC4WP 4.8
MC4WP 4.7.8
MC4WP 4.7.7
MC4WP 4.7.6
MC4WP 4.7.5
201916 releases
MC4WP 4.7.4
MC4WP 4.7.3
MC4WP 4.7.2
MC4WP 4.7.1
MC4WP 4.7
MC4WP 4.6.2
MC4WP 4.6.1
MC4WP 4.6.0
MC4WP 4.5.5
MC4WP 4.5.4
MC4WP 4.5.3
MC4WP 4.5.2
MC4WP 4.5.1
MC4WP 4.5.0
MC4WP 4.4
MC4WP 4.3.3
201811 releases
MC4WP 4.3.2
MC4WP 4.3.1
MC4WP 4.3
MC4WP 4.2.5
MC4WP 4.2.4
MC4WP 4.2.3
MC4WP 4.2.2
MC4WP 4.2.1
MC4WP 4.2
MC4WP 4.1.15
MC4WP 4.1.14
201716 releases
MC4WP 4.1.13
MC4WP 4.1.12
MC4WP 4.1.11
MC4WP 4.1.10
MC4WP 4.1.9
MC4WP 4.1.8
MC4WP 4.1.7
MC4WP 4.1.6
MC4WP 4.1.5
MC4WP 4.1.4
MC4WP 4.1.3
MC4WP 4.1.2
MC4WP 4.1.1
MC4WP 4.1.0
MC4WP 4.0.13
MC4WP 4.0.12
201628 releases
MC4WP 4.0.11
MC4WP 4.0.10
MC4WP 4.0.9
MC4WP 4.0.8
MC4WP 4.0.7
MC4WP 4.0.6
MC4WP 4.0.5
MC4WP 4.0.4
MC4WP 4.0.3
MC4WP 4.0.2
MC4WP 4.0.1
MC4WP 4.0
MC4WP 3.1.12
MC4WP 3.1.11
MC4WP 3.1.10
MC4WP 3.1.9
MC4WP 3.1.8
MC4WP 3.1.7
MC4WP 3.1.6
MC4WP 3.1.5
MC4WP 3.1.4
MC4WP 3.1.3
MC4WP 3.1.2
MC4WP 3.1.1
MC4WP 3.1
MC4WP 3.0.12
MC4WP 3.0.11
MC4WP 3.0.10
201536 releases
MC4WP 3.0.9
MC4WP 3.0.8
MC4WP 3.0.7
MC4WP 3.0.6
MC4WP 3.0.5
MC4WP 3.0.4
MC4WP 3.0.3
MC4WP 3.0.2
MC4WP 2.3.18
MC4WP 2.3.17
MC4WP 2.3.16
MC4WP 2.3.15
MC4WP 2.3.14
MC4WP 2.3.13
MC4WP 2.3.12
MC4WP 2.3.11
MC4WP 2.3.10
MC4WP 2.3.8
MC4WP 2.3.7
MC4WP 2.3.6
MC4WP 2.3.5
MC4WP 2.3.4
MC4WP 2.3.3
MC4WP 2.3.2
MC4WP 2.3.1
MC4WP 2.3
MC4WP 2.2.9
MC4WP 2.2.8
MC4WP 2.2.7
MC4WP 2.2.6
MC4WP 2.2.5
MC4WP 2.2.4
MC4WP 2.2.3
MC4WP 2.2.2
MC4WP 2.2.1
MC4WP 2.2
201422 releases
MC4WP 2.1.7
MC4WP 2.1.6
MC4WP 2.1.5
MC4WP 2.1.4
MC4WP 2.1.3
MC4WP 2.1.2
MC4WP 2.1.1
MC4WP 2.1
MC4WP 2.0.5
MC4WP 2.0.4
MC4WP 2.0.3
MC4WP 2.0.2
MC4WP 2.0.1
MC4WP 2.0
MC4WP 1.5.8
MC4WP 1.5.7
MC4WP 1.5.6
MC4WP 1.5.5
MC4WP 1.5.4
MC4WP 1.5.3
MC4WP 1.5.2
MC4WP 1.5.1
201317 releases
MC4WP 1.5
MC4WP 1.4.8
MC4WP 1.4.7
MC4WP 1.4.6
MC4WP 1.4.5
MC4WP 1.4.4
MC4WP 1.4.3
MC4WP 1.4.2
MC4WP 1.4.1
MC4WP 1.4
MC4WP 1.3.1
MC4WP 1.3
MC4WP 1.2.5
MC4WP 1.2.4
MC4WP 1.2.3
MC4WP 1.2.1
MC4WP 1.1.5
Questions about MC4WP’s releases
What is the latest version of MC4WP?
4.15.0, released on Nov 3, 2026 (6 days ago). It’s tested up to WordPress 7.1.4 and needs PHP 7.4 or later.
How often is MC4WP updated?
16 releases in the last year, about one every 23 days. Its first release on WordPress.org dates from September 2013.
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Track your plugin and its rivals: TrackWP sees each new release in the nightly snapshot and alerts you, with what it did to their rank.
Start freeRelease dates come from the day each version’s folder was made in MC4WP’s WordPress.org SVN repository; the notes from its readme’s changelog, as its authors wrote it.