CVE-2026-102382 in Majestic Support Plugin
Summary
by MITRE • 10/01/2026
Authorization Bypass Through User-Controlled Key vulnerability in Ahmad Majestic Support majestic-support allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Majestic Support: from n/a through 1.2.0.
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Analysis
by VulDB Data Team • 10/01/2026
The identified vulnerability represents a critical failure in access control mechanisms within the Majestic Support application, specifically categorized as an Authorization Bypass Through User-Controlled Key. This flaw allows attackers to manipulate input parameters that serve as keys for accessing sensitive resources or performing administrative actions without proper authorization checks. The root cause lies in the incorrect configuration of security levels and insufficient validation of user-supplied data used to identify specific entities within the system. By exploiting this weakness, an unauthorized actor can bypass intended restrictions, effectively gaining privileges they should not possess based on their assigned role or identity. This type of vulnerability is fundamentally linked to CWE-284 Improper Access Control, where the application fails to enforce appropriate access rights for a given context, and aligns with MITRE ATT&CK technique T1078 Valid Accounts if leveraged through compromised credentials, or more broadly under privilege escalation vectors that rely on manipulating system identifiers.
From an operational perspective, this vulnerability poses severe risks to data integrity and confidentiality within the support infrastructure. Since Majestic Support is designed to handle customer interactions and potentially sensitive ticketing information, unauthorized access could lead to the exposure of private user data, modification or deletion of critical support records, and disruption of service availability. An attacker with basic web application knowledge can craft requests that substitute legitimate resource identifiers with maliciously controlled ones, thereby accessing other users' tickets, viewing confidential communications, or altering system configurations. The impact is particularly acute because it undermines the foundational trust model of multi-tenant environments where isolation between different user groups is paramount. If left unpatched, this flaw could be chained with other vulnerabilities to achieve full system compromise, allowing for persistent backdoors or lateral movement within the network infrastructure hosting the application.
The vulnerability affects versions of Majestic Support from n/a through version 1.2.0, indicating a widespread exposure across multiple releases where the underlying access control logic was not adequately hardened against parameter manipulation. Developers must recognize that relying solely on client-side checks or simple server-side lookups without rigorous validation is insufficient for securing authorization decisions. The security level configuration errors suggest that default settings may have been left in place during deployment, or that dynamic role assignment mechanisms were implemented with flawed boundary conditions. This highlights the importance of implementing defense-in-depth strategies where access control is enforced at multiple layers, including database-level permissions and application logic validation, ensuring that even if one layer is bypassed, others remain intact to prevent unauthorized actions.
To mitigate this vulnerability, immediate action must be taken by upgrading to a patched version of Majestic Support released after 1.2.0 where the access control mechanisms have been corrected. In addition to updating software, organizations should conduct a thorough review of their input validation processes, ensuring that all user-controlled keys are validated against an allowlist or verified through secure session management tokens rather than relying on direct object references alone. Implementing role-based access control (RBAC) with strict enforcement at the API level can prevent unauthorized entities from interacting with resources outside their scope. Furthermore, regular security audits and penetration testing focused on authorization flaws should be integrated into the development lifecycle to detect similar misconfigurations early. Monitoring logs for anomalous patterns of resource access, such as rapid sequential requests targeting different user IDs, can also aid in detecting exploitation attempts in real-time, providing an additional layer of defense against this class of attacks.