CVE-2026-91847 Details
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.
A vulnerability exists in the Online Scheduling and Appointment Booking System WordPress plugin in versions prior to 28.2. The issue arises because the plugin does not verify whether the requester owns the AI booking-assistant conversation referenced in its unauthenticated conversation actions. This flaw allows any unauthenticated visitor to read another visitor's assistant messages and inject messages into their ongoing conversation.
Users are advised to update the Online Scheduling and Appointment Booking System WordPress plugin to version 28.2 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 19, 2026CISA-ADP
Assessed Sep 19, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/9eef3086-3a67-4ee2-bd78-e346e7b05d62/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Bookly | < 28.2 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 19, 2026 | CVE Modified | CISA-ADP |
| Sep 19, 2026 | New CVE Received | [email protected] |