Appointment Booking Calendar — Simply Schedule Appointments Booking: Sensitive information exposure
Appointment Booking Calendar — Simply Schedule Appointments Booking is affected by sensitive information exposure. The vulnerable path is reachable without authentication. Successful exploitation can disclose data that should not be available to the caller.
- Component
- Appointment Booking Calendar — Simply Schedule Appointments Booking
- Affected
- See vendor advisory
- Safe version
- See mitigation notes
- Published
- Dec 19, 2025
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Dec 19, 2025 and is one of 1 known issue for this plugin.
Update, patch or deactivate.
Update Appointment Booking Calendar — Simply Schedule Appointments Booking to a release outside the affected range, or disable and remove it until a fixed version is available.
No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.9.16. This is due to the plugin exposing its admin embed endpoint at `/wp-json/ssa/v1/embed-inner-admin` without authentication, which leaks plugin settings including staff names, business names, and configuration data that are not publicly displayed on the booking form. This makes it possible for unauthenticated attackers to extract private business configuration. In premium versions with integrations configured, this might also expose other sensitive data including API keys for external services.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N