CVE-2024-5333 in The Events Calendar Plugin
Summary
by MITRE • 12/16/2024
The Events Calendar WordPress plugin before 6.8.2.1 is missing access checks in the REST API, allowing for unauthenticated users to access information about password protected events.
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Analysis
by VulDB Data Team • 12/17/2024
The vulnerability identified as CVE-2024-5333 affects the Events Calendar WordPress plugin version 6.8.2.1 and earlier, representing a critical access control flaw that undermines the security posture of WordPress installations. This issue stems from insufficient authentication mechanisms within the plugin's REST API endpoints, creating a pathway for unauthorized individuals to bypass normal access restrictions. The flaw specifically targets the handling of password protected events, which are typically designed to restrict visibility to authorized users who possess the required credentials. When this vulnerability is exploited, unauthenticated attackers can retrieve sensitive information about events that should remain hidden due to their password protection status. The impact extends beyond simple information disclosure, as it potentially exposes confidential event details, attendee lists, or other sensitive metadata that organizers might have intended to keep private.
The technical implementation of this vulnerability resides in the plugin's REST API framework where access control checks are either absent or inadequately enforced for specific endpoints. According to CWE-284, this represents an improper access control vulnerability where the system fails to properly verify that the requesting entity has appropriate authorization levels to access protected resources. The flaw operates at the application layer, specifically within the WordPress REST API integration, where the Events Calendar plugin fails to validate user credentials or roles before serving responses containing password protected event data. This misconfiguration allows any external party to make REST API requests to retrieve event information without providing authentication credentials, effectively neutralizing the password protection mechanism that WordPress and the plugin are designed to enforce. The vulnerability demonstrates a clear violation of the principle of least privilege, as the system provides access to restricted resources without proper verification of user identity or authorization status.
From an operational standpoint, this vulnerability creates significant risks for organizations that rely on the Events Calendar plugin for managing sensitive or proprietary events. Attackers could potentially gather intelligence about event schedules, locations, or participant information, which might be valuable for competitive analysis, social engineering attacks, or other malicious activities. The exposure of password protected event details could compromise business operations, particularly when events contain confidential information, strategic planning details, or involve high-profile attendees. Organizations using the affected plugin version may unknowingly expose their event management data to unauthorized parties, leading to potential reputational damage, regulatory compliance issues, and operational security breaches. The vulnerability's exploitation requires minimal technical skill and can be automated, making it particularly dangerous as it allows for mass data collection across multiple installations without requiring specialized knowledge or tools.
The remediation strategy for CVE-2024-5333 centers on upgrading to version 6.8.2.1 or later of the Events Calendar plugin, which includes the necessary access control fixes. Organizations should immediately implement this update as a priority mitigation measure, ensuring that all affected WordPress installations receive the patch. Additionally, system administrators should conduct comprehensive vulnerability assessments to identify any other plugins or themes that might exhibit similar access control weaknesses. Network monitoring should be enhanced to detect unusual REST API activity patterns that might indicate exploitation attempts. According to ATT&CK framework category T1566, this vulnerability could be leveraged as an initial access vector, where attackers use information gathering techniques to discover exposed protected resources. Security teams should also consider implementing additional access controls at the web server level, such as rate limiting or IP restrictions on REST API endpoints, to provide defense-in-depth. Regular security audits of WordPress plugins and themes should be conducted to ensure that access control mechanisms remain robust and that no similar vulnerabilities are present in the broader plugin ecosystem. The incident underscores the critical importance of maintaining up-to-date security patches and the necessity of proper access control implementation in web applications, particularly those handling sensitive user or organizational data.