Description

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.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "4.3",
  "pubDate": "2026-09-04T14:17:18.193Z",
  "pubdate": "2026-09-04T14:17:18.193Z",
  "executiveSummary": "A critical Missing Authorization vulnerability has been identified within the Gastromenum Ticket and QR Menu System, affecting all versions released prior to 2026.08.31.\nThis security flaw stems from an improper implementation of Access Control Lists (ACLs), failing to enforce authorization checks on sensitive system functions.\nThe vulnerability allows unauthorized remote actors to bypass security boundaries and interact with restricted administrative or user-specific functionality without requiring valid authentication or elevated privileges.\nThe risk implication is significant, as successful exploitation enables attackers to manipulate system data, access restricted menu configurations, or potentially compromise customer-facing ticket operations.\nThere are no complex requirements for exploitation; a remote attacker capable of reaching the application's endpoints can trigger the unauthorized function calls directly by manipulating requested resource paths or API calls.\nThis vulnerability highlights a systemic failure in the application’s backend request validation layer, where the system implicitly trusts user-supplied requests without verifying the requester's authorization level.",
  "technicalDetails": "The core vulnerability is identified as a Missing Authorization flaw, specifically categorized by the failure of the application to properly constrain functionality based on predefined Access Control Lists (ACLs).\nIn the Gastromenum Ticket and QR Menu System, the backend architecture fails to perform mandatory authorization checks at the controller or service layer level when handling specific incoming HTTP requests.\nWhen a user or an unauthenticated entity initiates a request to an endpoint governed by these missing checks, the application server processes the request as if it originated from an authorized administrative session.\nThe root cause is an insecure design pattern where the authorization logic is either completely absent from the route handling or is conditionally bypassed during request routing, resulting in an 'Insecure Direct Object Reference' (IDOR) or a broader 'Broken Access Control' scenario.\nExploitation involves an attacker identifying the endpoint URLs associated with restricted functionalities—such as those used for ticket management or QR code generation—and submitting crafted HTTP requests to these endpoints.\nBecause the system lacks verification logic (e.g., checking session tokens, user roles, or ACL membership), the application proceeds to execute the requested business logic or data retrieval operation regardless of the attacker's authorization state.\nThe attack flow proceeds as follows: 1) The attacker maps the application's API or endpoint structure to identify sensitive functionality; 2) The attacker crafts an HTTP request targeting a restricted function; 3) The application’s middleware fails to perform a cross-reference check between the current request session and the required permissions; 4) The server executes the function with the implicit privileges of the system owner, effectively granting the attacker unauthorized access.\nThis vulnerability persists across all versions of the Gastromenum Ticket and QR Menu System prior to 2026.08.31. The lack of granular, per-request authorization checks means that any network-accessible endpoint is a potential vector for compromise.\nPost-exploitation impact includes potential unauthorized modification of order tickets, exposure of QR menu configurations, and unauthorized access to system-level administrative data. The lack of proper ACL enforcement significantly degrades the integrity and confidentiality of the entire menu and ticketing ecosystem."
}