s2Member v251005 (Framework and Pro) was released on October 5th, 2025.
Unified Changelog for s2Member & s2Member Pro v251005
(Framework) Security: Improved sanitization for Tracking API replacement values.
(Framework) Fix: Use the site URL host instead of HTTP_HOST for proxy key when Skip Domain Check is enabled.
(Framework) Fix: Ensure the Fallback IPN Signup Vars provide a valid item_number for cancellation handling.
Upgrading to the Latest Version
You should get a notification about the update in your admin. WP Admin > Plugins
You can also download the zip file from your Account page, and upload it. WP Admin > Plugins > Add New > Upload