CVE-2026-75951 in J-BusinessDirectory Extension
Summary
by MITRE • 08/19/2026
Joomla Extension - cmsjunkie.com - Insecure Direct Object Reference (multiple frontend/API actions) in J-BusinessDirectory < 6.2.3
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Analysis
by VulDB Data Team • 08/20/2026
The vulnerability identified as an insecure direct object reference within the J-Business Directory extension for Joomla versions prior to 6.2.3 represents a critical flaw in access control mechanisms, specifically affecting multiple frontend and API endpoints. This type of vulnerability arises when an application exposes internal implementation objects such as database keys or file paths directly to users without performing adequate authorization checks. In this specific context, the J-Business Directory plugin fails to verify whether the authenticated user has permission to access, modify, or delete data associated with a specific directory listing identified by its unique identifier passed in HTTP requests. This lack of proper object-level validation allows attackers to manipulate parameters such as item IDs to interact with resources belonging to other users or administrative entities, effectively bypassing intended security boundaries.
From a technical perspective, the flaw is rooted in how the extension processes input data from frontend forms and API calls. When a user submits an action request, the application retrieves the target object using the provided identifier without cross-referencing it against the current session's permissions or ownership records. This behavior aligns with CWE-639, which categorizes insecure direct object references as a failure to ensure that users are authorized to access specific objects based on their identity and role. The vulnerability is particularly severe because it affects both standard web interface interactions and programmatic API endpoints, thereby expanding the attack surface significantly. Attackers can exploit this by crafting malicious HTTP requests with altered identifiers to view sensitive business information, edit listings they do not own, or even delete critical directory entries, leading to data integrity compromise and potential denial of service conditions for legitimate users.
The operational impact of this vulnerability is substantial, as it undermines the core functionality of a business directory platform which relies heavily on accurate and secure user-generated content management. Successful exploitation can lead to unauthorized disclosure of private contact details, business hours, or proprietary information contained within listings. Furthermore, attackers may use these endpoints to inject malicious code into listing descriptions if input validation is also insufficient, although the primary vector here is authorization bypass rather than injection. This erosion of trust can have severe reputational and financial consequences for site administrators who rely on J-Business Directory to manage community or commercial directories. The ability to modify or delete data arbitrarily disrupts service availability and integrity, forcing administrators into reactive incident response scenarios that divert resources from normal operations.
To mitigate this vulnerability, immediate action is required by upgrading the J-Business Directory extension to version 6.2.3 or later, where these authorization checks have been implemented correctly. Developers should ensure that all frontend and API actions enforce strict ownership verification before processing any data manipulation requests. This involves validating that the user making the request owns the resource identified by the object ID or possesses administrative privileges sufficient for the action being performed. Additionally, implementing robust input validation on all parameters helps prevent secondary issues such as cross-site scripting if combined with this authorization flaw. Security testing should include automated scans focusing on broken access control patterns and manual penetration tests that attempt to manipulate identifiers in API calls to verify that proper denial responses are returned when unauthorized access is attempted. Adhering to OWASP Top 10 guidelines, particularly the category for Broken Access Control, will help prevent similar issues in future development cycles.