CVE-2026-57778 in Booking Calendar Plugin
Summary
by MITRE • 07/13/2026
Missing Authorization vulnerability in wpdevart Booking calendar, Appointment Booking System booking-calendar allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Booking calendar, Appointment Booking System: from n/a through <= 3.2.36.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/13/2026
This vulnerability represents a critical missing authorization flaw that undermines the access control mechanisms within the wpdevart Booking calendar and Appointment Booking System plugin. The issue stems from incorrectly configured security levels that fail to properly validate user permissions before granting access to sensitive administrative functions. Such misconfigurations create pathways for unauthorized users to exploit the system and gain elevated privileges, potentially leading to complete system compromise.
The technical flaw manifests as insufficient authorization checks within the plugin's codebase, specifically in how it handles user roles and capabilities. Attackers can leverage this weakness to bypass normal access controls and execute privileged operations without proper authentication. This type of vulnerability falls under the CWE-285 category, which addresses improper authorization scenarios in software applications. The vulnerability exists across all versions from the initial release through version 3.2.36, indicating a persistent flaw that has not been adequately addressed in the plugin's security architecture.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it can enable attackers to manipulate booking data, modify system configurations, and potentially exfiltrate sensitive user information. This weakness creates a persistent threat vector that allows malicious actors to establish footholds within WordPress environments where the vulnerable plugin is installed. The attack surface becomes particularly dangerous when considering that many organizations rely on booking systems for critical business operations involving customer data and appointment scheduling.
From an ATT&CK framework perspective, this vulnerability maps directly to privilege escalation techniques and initial access vectors, enabling adversaries to move laterally within compromised systems. The flaw allows attackers to leverage the plugin's legitimate functionality against itself, making detection more difficult as malicious activities appear to originate from authorized system components. Organizations running affected versions should immediately implement mitigations including plugin updates, enhanced monitoring of administrative activities, and review of user access permissions to prevent exploitation.
The root cause of this vulnerability lies in inadequate input validation and insufficient role-based access control implementation within the plugin's core architecture. Proper authorization mechanisms require comprehensive checks at multiple levels including user authentication, capability verification, and resource access validation before any privileged operations are permitted. Security practitioners should ensure that all administrative interfaces properly validate user credentials against defined roles and permissions to prevent unauthorized system modifications and data manipulation attempts.