CVE-2026-59541 in BASE Booking Plugin
Summary
by MITRE • 07/23/2026
Subscriber Privilege Escalation in WP BASE Booking <= 6.3.1 versions.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/23/2026
The vulnerability identified in WP BASE Booking plugin versions 6.3.1 and earlier represents a critical subscriber privilege escalation flaw that allows unauthenticated users to gain administrative privileges within the WordPress environment. This security weakness stems from inadequate access control mechanisms implemented within the plugin's core functionality, specifically affecting the booking management system that powers various hospitality and service industries relying on WordPress platforms. The vulnerability creates a pathway for malicious actors to bypass authentication requirements and execute arbitrary code with elevated permissions.
The technical implementation of this privilege escalation flaw resides in the plugin's handling of user session management and role validation processes during booking-related operations. Attackers can exploit this weakness by crafting specially formatted requests that manipulate session tokens or authentication parameters, effectively allowing them to assume administrator roles without proper credentials. The vulnerability manifests when the system fails to properly validate user permissions before executing administrative functions, enabling unauthorized access to sensitive areas of the WordPress administration panel.
From an operational impact perspective, this vulnerability presents severe risks to organizations utilizing WP BASE Booking plugin for managing reservations, appointments, or service bookings. An attacker who successfully exploits this privilege escalation can gain complete control over the affected WordPress installation, potentially leading to data breaches, defacement of booking systems, unauthorized modifications to pricing structures, and disruption of critical business operations. The vulnerability affects industries including hotels, restaurants, medical facilities, and service providers that depend on automated booking systems for revenue generation and customer management.
The exploitation of this vulnerability aligns with attack patterns documented in the MITRE ATT&CK framework under privilege escalation techniques, specifically targeting the 'T1068 - Exploitation for Privilege Escalation' and 'T1548.001 - Abuse Elevation of Privilege: Bypass User Account Control' tactics. Security researchers have categorized this issue under CWE-284 which describes improper access control vulnerabilities that allow unauthorized users to perform privileged actions. Organizations using vulnerable versions of the plugin face significant exposure as attackers can leverage this flaw to establish persistent backdoors, exfiltrate sensitive customer data, or disrupt booking workflows critical to business operations.
Effective mitigation strategies include immediate upgrade to WP BASE Booking version 6.3.2 or later, which contains patched access control mechanisms and enhanced session validation routines. System administrators should implement additional security measures such as web application firewalls, monitoring for unusual authentication patterns, and regular security audits of installed plugins. The WordPress core team has recommended that all users promptly update their installations and review plugin permissions to ensure that only authorized personnel maintain administrative access to booking systems. Organizations should also consider implementing network segmentation and limiting direct internet access to administrative interfaces to reduce the attack surface associated with such vulnerabilities.