CVE-2026-40308

My Calendar is a WordPress plugin for managing calendar events. In versions 3.7.6 and below, the mcajaxmcjsaction AJAX endpoint, registered for unauthenticated users, passes user-supplied arguments through parsestr without validation, allowing injection of arbitrary parameters including a site...

CVE-2026-40308: Authorization Bypass Through User-Controlled Key

My Calendar is a WordPress plugin for managing calendar events. In versions 3.7.6 and below, the mcajaxmcjsaction AJAX endpoint, registered for unauthenticated users, passes user-supplied arguments through parsestr without validation, allowing injection of arbitrary parameters including a site...