Bookly < 28.2 - Unauthenticated AI Assistant Conversation Disclosure and Message Injection via IDOR (CVE-2026-91847) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-91847

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

Answer in brief

CVE-2026-91847 records a Unknown severity vulnerability in Bookly < 28.2 - Unauthenticated AI Assistant Conversation Disclosure and Message Injection via IDOR. The current sources do not mark it as known exploited. The current feed maps Unknown/Online Scheduling and Appointment Booking System (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 19, 2026Updated Sep 19, 2026Source checked Sep 19, 2026First seen by HOL Sep 19, 2026Material review Sep 19, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/Online Scheduling and Appointment Booking System (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/Online Scheduling and Appointment Booking Systemgeneric	>=28.1 <28.2	28.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/Online Scheduling and Appointment Booking System.
Review the reported fix. Update Unknown/Online Scheduling and Appointment Booking System to 28.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 19, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.