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CVE-2026-91847— Bookly < 28.2 - Unauthenticated AI Assistant Conversation Disclosure and Message Injection via IDOR

Quick assessment

Affected
Unknown Online Scheduling and Appointment Booking System
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.

“在线排班与预约预订系统”WordPress 插件在 28.2 版本之前，未验证请求者是否拥有其未认证会话操作中指定的 AI 预订助手对话。这使得任何未认证访问者都可以读取其他访问者的助手消息，并向其正在进行的对话中注入消息。

AI Predicted 5.3 Difficulty: Easy
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I. Basic Information for CVE-2026-91847

Vulnerability Information
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Vulnerability Title
Bookly < 28.2 - Unauthenticated AI Assistant Conversation Disclosure and Message Injection via IDOR
Source: CVE Program / CVE List V5
Vulnerability Description
The Online Scheduling and Appointment Booking System WordPress plugin before 28.2 does not verify that the requester owns the AI booking-assistant conversation named in its unauthenticated conversation actions, allowing any unauthenticated visitor to read another visitor's assistant messages and to inject messages into their in-progress conversation.
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 Online Scheduling and Appointment Booking System 28.1 ~ 28.2 -

II. Public POCs for CVE-2026-91847

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III. Intelligence Information for CVE-2026-91847

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Vendor Advisories for CVE-2026-91847 (1)

Same Patch Batch · Unknown · 2026-09-19 · 21 CVEs total

CVE-2026-86814 UsersWP - Social Login < 1.5.10 - Unauthenticated Account Takeover via Unverified Provider
CVE-2025-15698 Business Name Generator <= 1.3 - Admin+ Stored XSS via Button Color Setting
CVE-2026-19860 JetFormBuilder 3.5.6.2 - 3.6.5.2 - Admin+ Arbitrary File Deletion via Server-Side Validati
CVE-2026-16557 Nimble Builder <= 3.3.8 - Subscriber+ Non-Public Content Disclosure via sek_get_nimble_con
CVE-2026-84750 Ultimate Addons for Contact Form 7 3.2.4 - 3.5.50 - Unauthenticated Arbitrary File Upload
CVE-2026-76554 WP Import Export Lite < 3.9.35 - Authenticated Privilege Escalation via User Import
CVE-2026-76790 Estatik < 4.3.5 - Reflected XSS via get_listings hash Parameter
CVE-2026-85574 Unbounce Landing Pages 1.1.1 - 1.1.4 - Subscriber+ Reverse-Proxy Target Hijack via set_unb
CVE-2026-85680 Ultimate Member < 2.13.1 - Unauthenticated Stored XSS via Profile Page Title
CVE-2026-86591 Botiga Pro < 1.6.5 - Unauthenticated Arbitrary Blog Options Update via Templates Builder R
CVE-2026-92435 Mailchimp for WooCommerce < 6.1.1 - Unauthenticated Broken Access Control in REST API
CVE-2026-92099 WPGraphQL Smart Cache < 2.3.2 - Unauthenticated Persisted Query Registration and Alias Squ
CVE-2026-88824 Master Blocks 1.4.1 - 1.4.1.4 - Unauthenticated Stored XSS via White Label Settings
CVE-2026-88926 VikRentItems Flexible Rental Management System < 1.2.4 - Unauthenticated SQLi
CVE-2026-92404 MgoSync 2.1.5 - 2.1.6 - Unauthenticated WooCommerce API Credential Disclosure
CVE-2026-92425 Hydra Booking < 1.2.4 - Hydra Host+ Cross-Host Account Modification and Deletion via IDOR
CVE-2026-92420 Hydra Booking < 1.2.2 - Hydra Host+ Cross-Host Booking Deletion and Modification via IDOR
CVE-2026-92421 Hydra Booking 1.1.0 - < 1.2.3 - Hydra Host+ Host Profile Takeover via IDOR
CVE-2026-92403 Secure Custom Fields < 6.9.4 - Unauthenticated Post Modification via Front-End Form ID Sub
CVE-2026-92430 Rede Itaú for WooCommerce < 5.4.7 - Unauthenticated Order Status Manipulation via PIX Webh

IV. Related Vulnerabilities

Same product: Online Scheduling and Appointment Booking System
Same vendor: Unknown

V. Comments for CVE-2026-91847

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