CVE-2026-6723— Appointment Booking Calendar <= 1.6.11.11 - Incorrect Authorization to Unauthenticated Sensitive Field Modification via Appointment Public Token
Quick assessment
Affected
croixhaug Simply Schedule Appointments
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
WordPress 插件 Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 在所有 1.6.11.11 及更低版本中存在不正确的授权漏洞。该漏洞源于预约更新的 REST API 端点未限制经令牌认证的客户可修改的字段。攻击者无需身份验证即可修改该预约中由管理员控制的字段，包括伪造付款确认、将预约重新分配给其他用户以及更改服务类型。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-6723
Vulnerability Information
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Vulnerability Title
Appointment Booking Calendar <= 1.6.11.11 - Incorrect Authorization to Unauthenticated Sensitive Field Modification via Appointment Public Token
Source: CVE Program / CVE List V5
Vulnerability Description
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Incorrect Authorization in all versions up to, and including, 1.6.11.11. This is due to the appointment update REST API endpoint not restricting which fields can be modified by token-authenticated customers. This makes it possible for unauthenticated attackers to modify admin-controlled fields on that appointment, including faking payment confirmation, reassigning the appointment to another user, and changing the service type.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| croixhaug | Simply Schedule Appointments | 0 ~ 1.6.11.11 | - |
|
II. Public POCs for CVE-2026-6723
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-6723 (2)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-6723
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