LatePoint Appointment Booking Plugin up to 5.7.3 on WordPress set_required_objects booking[id]/cart[id] authorization

Summaryinfo

A vulnerability has been found in LatePoint Appointment Booking Plugin up to 5.7.3 and classified as problematic. This affects the function OsStepsHelper::set_required_objects. This manipulation of the argument booking[id]/cart[id] causes authorization. This vulnerability appears as CVE-2026-103366. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in LatePoint Appointment Booking Plugin up to 5.7.3. It has been declared as problematic. Affected by this vulnerability is the function OsStepsHelper::set_required_objects. The manipulation of the argument booking[id]/cart[id] with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality. The summary by CVE is:

The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 5.7.3 via the `booking[id]` and `cart[id]` parameters on the `steps__reload_booking_form_summary_panel` and `steps__start` public routes (reachable through wp_ajax_nopriv_latepoint_route_call). This is due to `OsStepsHelper::set_required_objects()` feeding raw request parameters into `set_booking_object()` and `set_cart_object()`, which call `OsModel::set_data()` and load an arbitrary booking or cart row by primary key with no ownership check — the ownership guard the vendor added for the earlier disclosure lives only inside `OsStepsHelper::load_step()` and does not cover the sibling routes or `cart[id]` at all. This makes it possible for unauthenticated attackers to enumerate sequential booking / cart identifiers and read other customers' appointment details (service name, agent, date/time, duration, price breakdown, status) and other shoppers' pending checkout contents directly from the JSON responses.

It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-103366 since 09/30/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/14/2026).

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

• LatePoint

Name

• Appointment Booking Plugin

Version

• 5.7.0
• 5.7.1
• 5.7.2
• 5.7.3

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CPE 2.2info

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