The Appointment Booking Calendar — Simply Schedule Appointments plugin for WordPress is vulnerable to unauthorized access of sensitive data in all versions up to and including 1.6.9.29. This is due to two compounding weaknesses: (1) a non-user-bound `public_nonce` is exposed to unauthenticated users through the public `/wp-json/ssa/v1/embed-inner` REST endpoint, and (2) the `get_item()` method in `SSA_Settings_Api` relies on `nonce_permissions_check()` for authorization (which accepts the public nonce) but does not call `remove_unauthorized_settings_for_current_user()` to filter restricted fields. This makes it possible for unauthenticated attackers to access admin-only plugin settings including the administrator email, phone number, internal access tokens, notification configurations, and developer settings via the `/wp-json/ssa/v1/settings/{section}` endpoint. The exposure of appointment tokens also allows an attacker to modify or cancel appointments.
CVE-2026-3045 is a high severity with CVSS 7.5 Sensitive Information Exposure issue affecting the Plugin Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin. It affects Versions up to 1.6.9.29 and is fixed in 1.6.10.0.
CVE-2026-3045 is tracked for the Plugin Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin as high severity with CVSS 7.5. The affected range is Versions up to 1.6.9.29. Update Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin to 1.6.10.0 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
simply-schedule-appointments
View on wordpress.org
|
| CVE | CVE-2026-3045 |
| Patched Versions |
1.6.10.0
|
| Affected Versions |
Versions up to 1.6.9.29
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.7.7 - Authenticated (Subscriber+) SQL Injection
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.7.7 - Authenticated (Contributor+) SQL Injection via Shortcode
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.9.27 - Unauthenticated SQL Injection
Appointment Booking Calendar <= 1.6.10.0 - Unauthenticated SQL Injection via 'fields' Parameter
Appointment Booking Calendar <= 1.6.9.27 - Unauthenticated SQL Injection via 'append_where_sql' Parameter
Simply Schedule Appointments <= 1.6.9.9 - Unauthenticated SQL Injection via `order` and `append_where_sql` Parameters
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.8.5 - Unauthenticated Arbitrary Shortcode Execution
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.7.42 - Authenticated (Admin+) Remote Code Execution
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