LatePoint Appointment Booking Plugin up to 5.7.2 on WordPress Bundle Scheduling is_bundle_scheduling order_item_id authorization

Summaryinfo

A vulnerability was found in LatePoint Appointment Booking Plugin up to 5.7.2. It has been declared as critical. Affected by this vulnerability is the function is_bundle_scheduling of the component Bundle Scheduling. Executing a manipulation of the argument order_item_id can lead to authorization. This vulnerability is handled as CVE-2026-91050. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in LatePoint Appointment Booking Plugin up to 5.7.2. It has been declared as critical. This vulnerability affects the function is_bundle_scheduling of the component Bundle Scheduling. The manipulation of the argument order_item_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, integrity, and availability. CVE summarizes:

The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference / Missing Authorization in versions up to, and including, 5.7.2. This is due to the publicly reachable steps__start and steps__load_step routes accepting a params[presets][order_item_id] value that is copied verbatim into the booking object without verifying that the referenced order item belongs to the current customer, is a bundle item, is paid, or has remaining capacity — the is_bundle_scheduling() bundle discriminator is a mere !empty(order_item_id) truthiness check, and the code flow explicitly removes the customer and payment steps when this is truthy (the source even carries a TODO acknowledging the missing validation). This makes it possible for unauthenticated attackers to create approved appointments against other customers' order items and to read those customers' names, email addresses, and order codes returned in the booking confirmation.

The advisory is available at wordfence.com. This vulnerability was named CVE-2026-91050 since 09/14/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/10/2026).

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

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CPE 2.2info

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