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CVE-2026-18777— TrueBooker Appointment Booking < 1.2.7 - Unauthenticated Arbitrary Appointment Status Change via update_appointment_status

Quick assessment

Affected
Unknown TrueBooker
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.

TrueBooker WordPress 插件在 1.2.7 版本之前，其某个 AJAX 操作缺乏适当的授权检查，导致未认证的用户可以更改任意预约的状态，并触发向受影响客户发送的通知邮件。

AI Predicted 7.5 Difficulty: Easy EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown TrueBooker < 1.2.7 affected
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I. Basic Information for CVE-2026-18777

Vulnerability Information
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Vulnerability Title
TrueBooker Appointment Booking < 1.2.7 - Unauthenticated Arbitrary Appointment Status Change via update_appointment_status
Source: CVE Program / CVE List V5
Vulnerability Description
The TrueBooker WordPress plugin before 1.2.7 does not have proper authorisation checks in one of its AJAX actions, allowing unauthenticated users to change the status of arbitrary appointments, as well as to trigger notification emails to the affected customers.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown TrueBooker 0 ~ 1.2.7 -

II. Public POCs for CVE-2026-18777

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III. Intelligence Information for CVE-2026-18777

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News Coverage for CVE-2026-18777 (1)

Same Patch Batch · Unknown · 2026-08-19 · 38 CVEs total

CVE-2026-18779 TrueBooker Appointment Booking < 1.2.7 - Unauthenticated Appointment and Payment Record De
CVE-2026-18031 TabaPay Gateway <= 1.4.0 - Unauthenticated Account Takeover via Payment Callback
CVE-2026-17565 Animation Addons for Elementor < 2.7.2 - Unauthenticated Server-Side Request Forgery
CVE-2026-18466 WP Maps < 4.9.8 - Subscriber+ Unlimited Autoloaded Option Creation
CVE-2026-18051 W3 Total Cache < 2.10.5 - Unauthenticated Arbitrary Directory File Write and .htaccess Ove
CVE-2026-18231 WP Directory Kit < 1.5.7 - Unauthenticated User Email Disclosure via select_2_ajax_user
CVE-2026-18202 JetEngine < 3.8.14 - Author+ Stored XSS via SVG Upload
CVE-2026-18776 TrueBooker Appointment Booking < 1.2.7 - Unauthenticated Account Takeover via Multiple AJA
CVE-2026-18778 TrueBooker Appointment Booking < 1.2.7 - Unauthenticated Customer PII Disclosure via Multi
CVE-2026-18937 Broken Link Checker < 2.4.12 - Unauthenticated RCE via Query Variable Injection
CVE-2026-16979 SmartCrawl < 3.16.3 - Subscriber+ Private/Draft Post Title Disclosure and Post Meta Key En
CVE-2026-19055 ProSolution WP Client < 2.0.11 - Reflected XSS via Multiple Parameters
CVE-2026-19709 Membership For WooCommerce < 3.1.2 - Unauthenticated Member Data Disclosure via REST Consu
CVE-2026-19056 ProSolution WP Client < 2.0.11 - Reflected XSS via 'page' Parameter
CVE-2026-19416 KiviCare < 4.5.4 - Patient+ Cross-Patient Appointment Modification via IDOR
CVE-2026-19406 Easy Appointments < 4.0.1 - Contributor+ Sensitive Information Disclosure via REST Appoint
CVE-2026-19417 KiviCare < 4.5.4 - Patient+ Arbitrary Media Attachment Read via IDOR
CVE-2026-19782 WPS Bidouille < 1.33.5 - Subscriber+ User Email Disclosure via wps_get_users
CVE-2026-19842 SAML Single Sign On 4.8.85 - 5.4.6 - Unauthenticated Administrator Account Takeover via SA
CVE-2026-14334 Booking calendar, Appointment Booking System <= 3.2.36 - Unauthenticated Stored XSS via SV

Showing top 20 of 38 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: TrueBooker
Same vendor: Unknown

V. Comments for CVE-2026-18777

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