CVE-2026-19081 in Ticket and QR Menu System
Summary
by MITRE • 09/04/2026
Missing Authorization vulnerability in Gastromenum Gastromenum Ticket and QR Menu System allows Accessing Functionality Not Properly Constrained by ACLs.
This issue affects Gastromenum Ticket and QR Menu System: before 2026.08.31.
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Analysis
by VulDB Data Team • 09/04/2026
The identified security flaw within the Gastromenum Ticket and QR Menu System represents a critical failure in access control mechanisms, specifically categorized under CWE-285 as Improper Authorization. This vulnerability arises from an architectural deficiency where the application fails to adequately enforce Access Control Lists (ACLs) or role-based permissions on specific endpoints and functional modules. In a typical secure implementation, every request processed by the server must be validated against the user's assigned privileges before execution. However, in this affected version of the software, prior to release date 2026.08.31, certain administrative functions or sensitive data retrieval operations are accessible without requiring valid authentication tokens or sufficient privilege levels. This lack of proper constraint allows any authenticated user, and potentially unauthenticated users depending on the specific endpoint configuration, to bypass intended security boundaries.
From a technical perspective, this vulnerability typically manifests when developers rely solely on client-side checks for access control rather than implementing robust server-side validation. An attacker can exploit this by manipulating HTTP requests, such as altering parameters in API calls or directly accessing internal URLs that are not properly secured. The system processes these requests without verifying whether the initiating user has the requisite role to perform the action. This aligns with MITRE ATT&CK technique T1078, Valid Accounts, where an attacker leverages legitimate credentials but abuses their permissions due to insufficient privilege separation. It may also relate to T1546, Event Triggered Execution, if specific administrative actions trigger backend processes that are not gated by proper authorization checks.
The operational impact of this vulnerability is severe for organizations deploying the Gastromenum system in hospitality or retail environments. Since the software handles ticketing and QR menu operations, it often contains sensitive business logic including sales data, customer information, and potentially payment processing configurations. Unauthorized access to these functionalities could allow malicious actors to manipulate transaction records, view confidential customer details violating privacy regulations such as GDPR or CCPA, or alter pricing structures displayed via QR codes. In a worst-case scenario, an attacker with basic user privileges could escalate their rights to perform administrative tasks, leading to complete compromise of the system's integrity and availability. This undermines trust in the digital ordering process and exposes the business to significant financial and reputational damage.
To mitigate this vulnerability, immediate action is required by upgrading the Gastromenum Ticket and QR Menu System to a version released after 2026.08.31, where these access control issues have been addressed through rigorous code review and security testing. For organizations unable to upgrade immediately due to operational constraints, implementing compensating controls is essential. This includes deploying a Web Application Firewall (WAF) configured with rulesets that detect anomalous request patterns indicative of authorization bypass attempts, such as direct object reference manipulation or unexpected HTTP method usage. Additionally, administrators should enforce strict network segmentation to limit exposure of the application interface and ensure that all administrative interfaces are accessible only from trusted IP ranges using multi-factor authentication. Regular security audits focusing on role-based access control implementation will help prevent similar misconfigurations in future deployments.