CVE-2026-103079 in JS Help Desk Plugin
Summary
by MITRE • 10/05/2026
Authorization Bypass Through User-Controlled Key vulnerability in Ahmad JS Help Desk js-support-ticket allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects JS Help Desk: from n/a through 4.0.0.
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Analysis
by VulDB Data Team • 10/05/2026
The vulnerability identified as an Authorization Bypass Through User-Controlled Key within the Ahmad JS Help Desk software, specifically affecting versions up to and including 4.0.0, represents a critical failure in access control mechanisms. This flaw allows attackers to manipulate input parameters that serve as keys for identifying resources or user sessions, thereby circumventing intended security restrictions. In typical web application architectures, authorization checks rely on server-side validation of identifiers such as session tokens, database IDs, or configuration keys to ensure that users can only perform actions and access data appropriate to their assigned roles. When these keys are directly derived from user-controlled input without sufficient integrity verification or binding to the authenticated context, the system becomes susceptible to unauthorized privilege escalation or data exposure.
From a technical perspective, this vulnerability stems from an insecure direct object reference pattern where the application fails to verify that the requesting user is authorized to access the specific resource identified by the provided key. Instead of validating permissions against a secure server-side session state or role-based policy, the software trusts the client-supplied identifier as authoritative for determining access rights. This design oversight enables attackers to modify these keys in HTTP requests to target administrative functions, view other users' tickets, or alter system configurations that should be restricted to privileged accounts. The absence of proper boundary checks between user input and security logic creates a pathway for exploitation where the attacker simply alters numerical IDs or string-based identifiers to point toward protected assets.
The operational impact of this vulnerability is severe, as it effectively nullifies the application's ability to enforce role-based access control. An authenticated low-privilege user can potentially escalate their privileges to that of an administrator by manipulating keys associated with administrative endpoints. This could lead to the complete compromise of the help desk system, including the exposure of sensitive customer data contained within support tickets, modification or deletion of critical configurations, and potential further exploitation through subsequent attacks such as cross-site scripting if stored user input is reflected without sanitization. The integrity of the entire ticketing workflow is compromised, undermining trust in the platform's ability to manage secure communications between customers and support staff.
This vulnerability aligns with Common Weakness Enumeration (CWE) ID 639, which describes Authorization Bypass Through User-Controlled Key, a subset of broader insecure direct object references. In terms of offensive security frameworks, this flaw facilitates techniques categorized under MITRE ATT&CK T1078, specifically Valid Accounts and potentially T1078.002 for Default Accounts if default credentials are also weakly protected by the same flawed logic. The exploitation vector typically involves modifying parameters in HTTP requests sent to the application server, requiring no special privileges other than valid authentication at a lower level.
Mitigation strategies must focus on implementing robust authorization checks that decouple resource identification from user control over access decisions. Developers should ensure that all sensitive operations validate permissions against server-side session data or role assignments rather than relying solely on input parameters. Implementing indirect reference maps, where internal identifiers are mapped to opaque public keys that do not reveal sequential patterns or administrative status, can also reduce the risk of enumeration and bypass attempts. Additionally, applying principle of least privilege ensures that even if a key is manipulated, the underlying database permissions restrict access to only necessary data fields. Regular security audits and static code analysis focused on authentication and authorization logic are essential to detect such flaws before deployment in production environments.