Appointment Booking Calendar Plugin – Bookr: A security weakness
Appointment Booking Calendar Plugin – Bookr is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation.
- Component
- Appointment Booking Calendar Plugin – Bookr
- Plugin slug
bookr- Affected
- See vendor advisory
- Safe version
- See mitigation notes
- Published
- Feb 14, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Feb 14, 2026 and is one of 1 known issue for this plugin.
Update, patch or deactivate.
Update Appointment Booking Calendar Plugin – Bookr 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 Plugin – Bookr plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the update-appointment REST API endpoint in all versions up to, and including, 1.0.2. This makes it possible for unauthenticated attackers to modify the status of any appointment.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N