Ladela Bookly Plugin up to 28.1 on WordPress conversation_id authorization

Summaryinfo

A vulnerability classified as critical was found in Ladela Bookly Plugin up to 28.1. This affects an unknown part. Such manipulation of the argument conversation_id leads to authorization. This vulnerability is referenced as CVE-2026-89063. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Ladela Bookly Plugin up to 28.1. It has been rated as critical. Affected by this issue is an unknown function. The manipulation of the argument conversation_id with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 28.1 via the 'conversation_id' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to read the full AI booking conversation transcript of any customer — leaking names, email addresses, phone numbers, and appointment details echoed by the assistant — and inject arbitrary messages into any victim conversation that are subsequently replayed to the Cloud AI worker along with the full private history. Because AI conversations are stored with no owner, user, or session identifier and conversation IDs are sequential integers, an unauthenticated attacker can enumerate all customer conversations simply by incrementing the conversation_id parameter.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-89063 since 09/10/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/16/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• Ladela

Name

• Bookly Plugin

Version

• 28.0
• 28.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

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