murgroland WP Booking System Plugin up to 2.1.0.3 on WordPress authorization

Summaryinfo

A vulnerability described as critical has been identified in murgroland WP Booking System Plugin up to 2.1.0.3. Affected is an unknown function. Executing a manipulation can lead to authorization. This vulnerability is tracked as CVE-2026-109369. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in murgroland WP Booking System Plugin up to 2.1.0.3. This vulnerability affects an unknown code block. The manipulation 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 WP Booking System – Booking Calendar plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.1.0.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to grant themselves and arbitrary other users edit access to every booking form on the site by overwriting the user_permission meta that governs the plugin's own access-control list. Exploitation requires the attacker to have already been delegated edit rights on at least one booking form, as this delegation both downgrades the submenu capability to 'read' (making the edit page accessible) and allows them to harvest a valid wpbs_edit_form nonce that will pass validation against any other form_id.

The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-109369 since 10/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/17/2026).

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

• murgroland

Name

• WP Booking System Plugin

Version

• 2.1.0.0
• 2.1.0.1
• 2.1.0.2
• 2.1.0.3

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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