CVE-2026-2324 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability identified in the LatePoint – Calendar Booking Plugin for Appointments and Events, a popular WordPress plugin used for managing bookings and events. The vulnerability exists in all versions up to and including 5.2.7 due to missing or incorrect nonce validation in the reload_preview() function. Nonces are security tokens used to verify that requests originate from legitimate users and not from malicious third parties. The absence or improper implementation of nonce checks allows an attacker to craft a malicious request that, when executed by an authenticated administrator (via clicking a link or visiting a malicious page), can update plugin settings or inject malicious web scripts. This can lead to unauthorized configuration changes and potential cross-site scripting (XSS) attacks, compromising the confidentiality and integrity of the affected site. The vulnerability does not require the attacker to be authenticated but does require user interaction from an administrator. The CVSS v3.1 base score is 6.1, reflecting network attack vector, low attack complexity, no privileges required, but requiring user interaction and impacting confidentiality and integrity with a scope change. No public exploits have been reported yet, but the risk remains significant due to the plugin's administrative context and widespread use in WordPress environments.

The primary impact of this vulnerability is unauthorized modification of plugin settings and potential injection of malicious scripts, which can compromise the confidentiality and integrity of the affected WordPress site. Attackers could leverage this to alter booking configurations, redirect users, or implant persistent malicious code, potentially leading to further exploitation such as credential theft or site defacement. Since the vulnerability requires an administrator to interact with a crafted request, the risk is somewhat mitigated but remains serious in environments with multiple administrators or where phishing attacks are feasible. Organizations relying on LatePoint for customer bookings and event management may face operational disruptions, reputational damage, and data breaches if exploited. The vulnerability does not affect availability directly but could indirectly cause service disruptions if malicious changes degrade functionality or require emergency remediation.

To mitigate this vulnerability, organizations should immediately update the LatePoint plugin to a version that addresses the nonce validation issue once available. In the absence of an official patch, administrators can implement manual nonce checks in the reload_preview() function to ensure requests are properly validated. Additionally, enforcing strict administrative access controls and limiting the number of users with plugin management privileges reduces exposure. Employing web application firewalls (WAFs) with custom rules to detect and block suspicious POST requests targeting the vulnerable function can provide interim protection. Educating administrators about phishing and social engineering risks is critical to prevent inadvertent interaction with malicious links. Regularly auditing plugin configurations and monitoring for unusual changes can help detect exploitation attempts early. Finally, maintaining a robust backup and recovery strategy ensures rapid restoration if compromise occurs.