CVE-2026-25327 in Five Star Restaurant Reservations Plugin
Summary
by MITRE • 03/25/2026
Missing Authorization vulnerability in Rustaurius Five Star Restaurant Reservations restaurant-reservations allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Five Star Restaurant Reservations: from n/a through <= 2.7.9.
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Analysis
by VulDB Data Team • 03/31/2026
The vulnerability identified as CVE-2026-25327 represents a critical missing authorization flaw within the Rustaurius Five Star Restaurant Reservations system, specifically impacting versions ranging from the initial release through version 2.7.9. This security weakness stems from incorrectly configured access control security levels that fail to properly validate user permissions before granting access to sensitive reservation functionalities. The flaw exists at the application level where proper authorization checks are either absent or improperly implemented, allowing unauthorized users to bypass normal access controls and potentially manipulate restaurant reservation data.
This missing authorization vulnerability falls under the CWE-863 category of Incorrect Authorization, which specifically addresses situations where the application fails to properly enforce access control policies. The issue manifests when the system does not adequately verify whether a user possesses the necessary privileges to perform specific actions within the reservation management interface. Attackers can exploit this weakness by crafting requests that target reservation modification functions without proper authentication or authorization, potentially gaining access to confidential customer information, modifying existing reservations, or creating fraudulent bookings. The vulnerability represents a fundamental breakdown in the principle of least privilege, where users may access resources beyond their designated permissions.
The operational impact of this vulnerability extends beyond simple data exposure to encompass potential financial losses and reputational damage for restaurant establishments using the affected software. Unauthorized individuals could manipulate reservation systems to book tables for themselves, cancel legitimate reservations, or access detailed customer information including personal contact data and reservation histories. This creates significant security risks for both the restaurant business and its patrons, as the compromised system may be used to facilitate fraudulent activities or data breaches. The vulnerability affects the entire reservation management ecosystem, potentially allowing attackers to disrupt normal business operations while simultaneously creating opportunities for identity theft or financial fraud.
Mitigation strategies for this vulnerability require immediate implementation of proper access control mechanisms throughout the reservation system. Organizations should implement robust authentication and authorization checks at every point where reservation data is accessed or modified, ensuring that all user interactions are properly validated against defined permission levels. The system must enforce role-based access controls where different user types have clearly defined capabilities, preventing unauthorized access to administrative functions. Security patches should be deployed immediately to address the authorization flaw, and organizations should conduct comprehensive access control reviews to identify and remediate similar vulnerabilities throughout their application architecture. Additionally, implementing proper logging and monitoring capabilities will help detect unauthorized access attempts and provide evidence for forensic analysis if security incidents occur. The remediation process should align with industry standards such as those outlined in the NIST Cybersecurity Framework and should incorporate security best practices from the OWASP Top Ten project to ensure comprehensive protection against similar access control vulnerabilities.