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Medium · 4.8 CVE-2026-91847 EUVD-2026-83509GHSA-mj5r-8jcf-67xr

Bookly < 28.2 - Unauthenticated AI Assistant Conversation Disclosure and Message Injection via IDOR

Published Sep 19, 2026 · Updated Sep 19, 2026 · Assigned by WPScan

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.

Affected products

VendorProductAffectedFixed
— Online Scheduling and Appointment Booking System 28.1 – < 28.2 28.2

References