The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.6.9.29. This is due to the `get_item_permissions_check` method granting access to users with the `ssa_manage_appointments` capability without validating staff ownership of the requested appointment. This makes it possible for authenticated attackers, with custom-level access and above (users granted the ssa_manage_appointments capability, such as Team Members), to view appointment records belonging to other staff members and access sensitive customer personally identifiable information via the appointment ID parameter.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Simply Schedule Appointments Plugin | — | Update simply-schedule-appointments plugin to version 1.6.10.0, or a newer patched version | Apr 30, 2026 | Mar 12, 2026 |
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