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Back to active CVEs
Medium · CVSS 4.8CVE-2026-91847

Bookly < 28.2 - Unauthenticated AI Assistant Conversation Disclosure and Message Injection via IDORCVE-2026-91847

Answer in brief

CVE-2026-91847 records a Medium severity (CVSS 4.8) 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 21, 2026Source checked Nov 3, 2026First seen by HOL Sep 19, 2026Material review Sep 21, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 4.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 4.8. 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
PackageAffected rangeFixed version
Unknown/Online Scheduling and Appointment Booking Systemgeneric>=28.1 <28.228.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/Online Scheduling and Appointment Booking System.
  2. 2Review 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

  1. Published upstream

    Sep 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. 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.

Related CVEs

  • Information Disclosure in extension "Mail" (mail)Also CWE-639
  • Broken Access Control in extension "Frontend User Registration" (sf_register)Also CWE-639

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-639
Source
CVE List V5
Source checked
Nov 3, 2026
References
1 linked source
Open source record