Changelog

This page is the plugin changelog for the Contact Form 7 Mailchimp extension. Every release is listed below with what changed and why.

For the other integrations, each plugin page carries its own plugin changelog. Start from contributions, or check the canonical listings on WordPress.org.

For the latest Chimpmatic release notes and documentation, visit chimpmatic.com/changelog
VersionDescription

0.9.78.02

OAuth Self-Healing & Status Polling

Fixed orphaned OAuth credentials from Pro-to-Lite transitions. Replaced popup.closed polling with gateway status polling for reliable cross-browser OAuth connections. Moved account name fetch from oauth/finish to validate_key for faster OAuth completion.

Improvements (3)
  • OAuth popup detection replaced with gateway status polling for reliable cross-browser support
  • Account name now fetched during API validation instead of separate HTTP call during OAuth finish
  • validate_key uses /3.0/ root endpoint instead of /3.0/ping — same cost, returns account metadata
Fixes (3)
  • Fixed orphaned OAuth state when switching between Pro and Lite — encrypted credentials detected and restored automatically
  • Fixed submission handler skipping OAuth-connected forms missing auth_type in config
  • Fixed Pro field sync and submission handler not resolving OAuth API keys
Patches (0)

0.9.75

Nullable Type Hint Fix

Fixed nullable type hint to prevent fatal TypeError on PHP 8.1+.

Improvements (0)
Fixes (1)
  • Fixed nullable type hint to prevent fatal TypeError
Patches (0)

0.9.73

Form Preview Tool

New preview tool for testing form submissions. API key masking for security.

Improvements (2)
  • Test form submissions with the preview tool
  • API key masking in admin UI
Fixes (0)
Patches (0)

0.9.22

Security Hardening

Major security hardening — CSRF protection, input validation, nonce verification.

Improvements (3)
  • CSRF protection on all form handlers
  • Input validation and sanitization
  • Nonce verification on settings pages
Fixes (0)
Patches (1)
  • Updated security practices to OWASP standards

0.8.01

Security Reports Addressed

Addressed security reports from responsible disclosure program.

Improvements (0)
Fixes (2)
  • Addressed security vulnerabilities from responsible disclosure
  • Hardened API key storage
Patches (1)
  • Updated dependencies

0.7.50

PHP 8 Compatibility Continued

Continued PHP 8.0 and 8.1 compatibility improvements.

Improvements (0)
Fixes (2)
  • Fixed remaining PHP 8.1 deprecation notices
  • Fixed named argument compatibility
Patches (1)
  • Updated minimum PHP requirement to 7.4

0.7.01

PHP 8 Compatibility

Full PHP 8.0 compatibility with deprecation fixes.

Improvements (1)
  • PHP 8.0 compatibility
Fixes (2)
  • Fixed PHP 8.0 deprecation warnings
  • Fixed null parameter type errors
Patches (0)

0.6.10

Bug Fixes and UI Updates

Multiple bug fixes and admin interface updates.

Improvements (1)
  • Updated admin interface styling
Fixes (2)
  • Fixed subscriber sync edge cases
  • Fixed list refresh caching issue
Patches (1)
  • Code cleanup and minor UI tweaks

0.5.64

Bug Fix Round and URL Sanitization

Multiple bug fix rounds with URL sanitization improvements.

Improvements (1)
  • URL sanitization for redirect URLs
Fixes (3)
  • Fixed debug log cleaner
  • Fixed URL sanitization edge cases
  • Removed other bugs
Patches (0)

0.5.01

Major Rewrite — Ajax Integration

Major rewrite with Ajax-based list loading. Fixed critical 10-list limitation bug.

Improvements (3)
  • Complete Ajax rewrite for list loading
  • Removed 10-list limitation
  • Improved API response handling
Fixes (1)
  • Fixed bug limiting accounts to 10 mailing lists
Patches (1)
  • Refactored codebase architecture

0.4.60

API Method Updates

Updated Mailchimp API methods and fixed date format issues.

Improvements (1)
  • Updated to latest Mailchimp API methods
Fixes (2)
  • Fixed date format compatibility
  • Fixed API response parsing
Patches (0)

0.4.43

TagsManager Error Fix

Fixed TagsManager errors causing form submission failures.

Improvements (0)
Fixes (2)
  • Fixed TagsManager errors
  • Fixed form processing edge cases
Patches (0)

0.4.01

PHP Error Fixes

Fixed PHP notices and warnings affecting error logs.

Improvements (0)
Fixes (2)
  • Fixed PHP notices on uninitialized variables
  • Fixed PHP warnings on array access
Patches (0)

0.3.50

Mail-Tag List Helpers

Added mail-tag list helper functions for easier field mapping.

Improvements (1)
  • Mail-tag list helpers for field mapping
Fixes (0)
Patches (0)

0.3.40

Bug Fix and WP 4.8 Compatibility

Bug fixes and WordPress 4.8 compatibility update.

Improvements (1)
  • WordPress 4.8 compatibility
Fixes (1)
  • Fixed subscriber data sync issue
Patches (0)

0.3.20

Debugger Option

Added built-in debugger option for troubleshooting API connections.

Improvements (1)
  • Built-in debugger option for troubleshooting
Fixes (0)
Patches (0)

0.3.10

Referrer Page Tag and Dependency Check

Added referrer page tag for tracking form source. CF7 dependency check on activation.

Improvements (2)
  • Referrer page tag for tracking form source
  • CF7 dependency check on plugin activation
Fixes (0)
Patches (0)

0.3.01

Double Opt-in Support

Added double opt-in support for GDPR-friendly subscriber confirmation.

Improvements (1)
  • Double opt-in subscriber confirmation
Fixes (0)
Patches (0)

0.2.30

Form Duplication Bug Fix

Fixed Contact Form 7 form duplication bug.

Improvements (0)
Fixes (1)
  • Fixed CF7 form duplication bug when saving
Patches (0)

0.2.20

Plugin Conflict Fix

Fixed conflict with other Mailchimp plugins on the same installation.

Improvements (0)
Fixes (1)
  • Fixed conflict with other Mailchimp plugins
Patches (0)

0.2.15

CF7 4.2 Compatibility

Updated for Contact Form 7 version 4.2 compatibility.

Improvements (1)
  • Contact Form 7 4.2 compatibility
Fixes (0)
Patches (0)

0.2.10

Opt-in Checkbox

Added opt-in checkbox so visitors can choose whether to subscribe.

Improvements (1)
  • Opt-in checkbox for visitor consent
Fixes (0)
Patches (0)

0.2.5

Subscriber Bug Fix

Fixed form not submitting when email was already subscribed to the list.

Improvements (0)
Fixes (1)
  • Fixed form not submitting when email already subscribed
Patches (0)

0.1.5

Conditionals Support

Added conditional logic for Mailchimp field mapping.

Improvements (1)
  • Conditional logic for field mapping
Fixes (0)
Patches (0)

0.1.2

Initial Release

First release of Contact Form 7 Mailchimp Extension. Simple integration between CF7 and Mailchimp mailing lists.

Improvements (4)
  • Connect Contact Form 7 to Mailchimp
  • Support for custom fields
  • Multiple mailing lists support
  • Latest Mailchimp API integration
Fixes (0)
Patches (0)

Where each changelog lives

Every plugin publishes its own release notes. The listing below covers the Contact Form 7 Mailchimp extension. For the AWeber, Campaign Monitor, GetResponse and iContact integrations, open the plugin page from contributions and the entries appear at the foot of each one.

WordPress.org also mirrors the release history for anything distributed there, and the developers tab shows the same versions alongside the download archive.