CVE-2026-75957 Ultimate Multisite <= 2.15.0 - Unauthenticated Authentication Bypass via 'checkout_form' Parameter

The Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 2.15.0 via the checkoutform parameter of the logincustomeraftercheckout function. This is due to the publicly accessible...

CVE-2026-75957

The Ultimate Multisite WordPress plugin (versions ↜ 2.15.0 ) is vulnerable to an Authentication Bypass via the checkout_form parameter in the login_customer_after_checkout function. The publicly accessible wu_ajax_nopriv_wu_validate_form AJAX handler accepts a freely obtainable nonce. When the ch...

EUVD-2026-90546

The Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 2.15.0 via the checkoutform parameter of the logincustomeraftercheckout function. This is due to the publicly accessible...