CVE-2026-109684 in Amelia Plugin
Summary
by MITRE • 10/13/2026
Missing Authorization vulnerability in TMS Amelia ameliabooking allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Amelia: from n/a through 2.4.10.
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Analysis
by VulDB Data Team • 10/13/2026
The identified security flaw within the Travel Management System (TMS) known as Amelia, specifically in versions ranging from non-existent initial releases up to version 2.4.10, represents a critical failure in access control mechanisms. This vulnerability is classified under the category of Missing Authorization, which fundamentally indicates that the application fails to properly verify whether an authenticated user has the necessary permissions to perform specific actions or access certain resources. In secure software architecture, authorization checks must be enforced on every request directed at protected endpoints, ensuring that users can only interact with data and functions explicitly assigned to their role or privilege level. The presence of this flaw suggests that Amelia relies insufficiently on server-side validation for administrative or restricted functionalities, allowing attackers who have obtained valid credentials to bypass intended security boundaries.
From a technical perspective, the core issue lies in the incorrect configuration of access control security levels within the application logic. When an attacker authenticates with even low-privilege credentials, such as those assigned to standard customers or basic staff members, they can manipulate HTTP requests to invoke administrative functions that should be restricted to super-users or system administrators. This typically involves altering parameters in API calls, modifying URL paths, or sending crafted POST requests that target internal endpoints designed for management tasks. Because the server does not adequately validate the user's role against the requested action before processing it, the application executes these privileged operations as if they were authorized. This type of flaw is distinct from authentication bypasses because the attacker already possesses valid login credentials; however, the lack of proper authorization checks effectively elevates their privileges to a level that compromises the integrity and confidentiality of the entire system.
The operational impact of this vulnerability is severe, particularly for organizations relying on Amelia for booking management, customer data handling, and financial transactions. An exploited instance allows malicious actors to perform unauthorized administrative actions such as modifying user accounts, changing pricing structures, accessing sensitive personal information of customers, or even deleting critical business records. This can lead to significant financial loss through fraudulent bookings or refunds, reputational damage due to public exposure of private customer data, and potential regulatory penalties under frameworks like GDPR or CCPA for failing to protect personally identifiable information. Furthermore, the ability to alter system configurations could allow attackers to install backdoors or disable security logging features, facilitating long-term persistence within the network environment without detection by standard monitoring tools.
This vulnerability aligns closely with CWE-269, which describes Improper Privilege Control, and is also associated with CWE-862, Missing Authorization. In terms of offensive cybersecurity frameworks, this behavior maps directly to MITRE ATT&CK technique T1078, specifically the sub-technique for Valid Accounts, where adversaries use legitimate credentials to gain access and then exploit misconfigurations or missing checks to escalate privileges within the target environment. The exploitation path typically involves reconnaissance followed by privilege escalation through direct manipulation of application logic rather than exploiting a software bug in code execution.
To mitigate this risk, immediate action is required for all organizations running Amelia versions up to 2.4.10. The primary remediation step is to apply the latest security patch provided by the vendor, which should enforce strict role-based access control checks on all administrative endpoints. In addition to updating software, administrators should implement defense-in-depth strategies such as Web Application Firewalls configured to detect anomalous request patterns indicative of privilege escalation attempts. It is also advisable to conduct a thorough audit of user roles and permissions within the system to ensure that least-privilege principles are strictly enforced. Regular penetration testing focused on access control mechanisms can help identify similar misconfigurations before they are exploited by malicious actors, ensuring robust protection against unauthorized administrative actions.