CVE-2024-4083 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the Easy Restaurant Table Booking plugin for WordPress, versions up to and including 1.0.0. The root cause is the absence or improper implementation of nonce validation during the saving of plugin settings. Nonces are security tokens used to verify that requests originate from legitimate users and not from malicious third parties. Without proper nonce checks, an attacker can craft a malicious request that, when executed by an authenticated administrator (e.g., by clicking a link), causes unauthorized changes to the plugin’s configuration. This vulnerability does not require the attacker to be authenticated but does require the victim to have administrative privileges and to perform an action that triggers the forged request. The impact is limited to integrity, as attackers can alter settings but cannot directly access sensitive data or disrupt service availability. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N) reflects network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or availability impact, and limited integrity impact. No patches or exploits are currently reported, but the vulnerability is publicly disclosed and should be addressed promptly.

The primary impact of this vulnerability is the unauthorized modification of plugin settings, which can lead to misconfiguration of the restaurant booking system. This may result in operational disruptions, incorrect booking data, or potential exposure to further attacks if settings control security-related features. Since the attacker must trick an administrator into clicking a malicious link, the risk depends on the administrator’s susceptibility to social engineering. While confidentiality and availability are not directly affected, integrity compromise can undermine trust in the booking system and cause business process issues. Organizations relying on this plugin for customer reservations may face reputational damage and operational inefficiencies if exploited. The lack of known exploits reduces immediate risk but does not eliminate the threat, especially as the vulnerability is publicly known.

Organizations should immediately verify if they use the Easy Restaurant Table Booking plugin and identify the installed version. Since no official patch links are provided, administrators should monitor the vendor’s site for updates or security patches addressing nonce validation. As an interim mitigation, restrict administrative access to trusted personnel and implement strict user training to avoid clicking suspicious links. Employ web application firewalls (WAFs) with custom rules to detect and block CSRF attempts targeting the plugin’s settings endpoints. Additionally, enforce multi-factor authentication (MFA) for administrator accounts to reduce the risk of compromised credentials being exploited in conjunction with CSRF. Regularly audit plugin configurations and logs for unauthorized changes. Consider disabling or replacing the plugin if a timely patch is unavailable.