CVE-2026-108717 in iTop
Summary
by MITRE • 10/11/2026
Combodo iTop 3.1.0 through 3.3.0 contains a missing authorization vulnerability in LinkSetController.php that allows authenticated console users to bypass profile grants by supplying arbitrary class and key parameters. Attackers can invoke the linkset delete, detach and get-remote-object routes to delete objects, clear external keys, and read object attributes without permission.
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Analysis
by VulDB Data Team • 10/11/2026
The identified vulnerability in Combodo iTop versions 3.1.0 through 3.3.0 represents a critical failure in access control logic within the LinkSetController component of the application's web console. This flaw specifically targets authenticated users, allowing them to manipulate data structures that should be restricted by their assigned profile permissions. The core technical issue stems from an insufficient validation mechanism when processing requests for linkset operations such as deletion, detachment, and retrieval of remote object attributes. Instead of verifying whether the requesting user has explicit authorization to modify or view specific objects based on their role-based access control settings, the application relies on arbitrary class and key parameters supplied directly by the client. This design oversight enables an attacker to bypass standard security checks by injecting identifiers for resources they do not own or have permission to interact with.
From a technical perspective, the vulnerability exploits the lack of server-side authorization enforcement in three distinct API endpoints exposed through the console interface. When an authenticated user invokes routes associated with linkset deletion, detachment, or remote object retrieval, the backend processes these requests based solely on the provided class and key parameters without cross-referencing them against the user's profile grants. This allows for unauthorized data manipulation where a low-privilege user can delete critical configuration objects, clear external keys that maintain referential integrity within the database, or read sensitive attributes of other users' records. The absence of proper identity verification at these specific entry points creates a direct path to privilege escalation and data compromise, as the system trusts client-supplied identifiers over actual permission states.
The operational impact of this vulnerability is severe due to its potential for both confidentiality breaches and integrity violations. Attackers can achieve unauthorized access to sensitive information stored within the IT service management database by reading object attributes that are meant to be private or restricted to specific roles such as administrators or technical support staff. Furthermore, the ability to delete objects or clear external keys poses a significant risk to system stability and data consistency. Deleting critical configuration items can disrupt ongoing services tracked in iTop, while clearing external keys may break relationships between different entities, leading to corrupted records and potential application errors that require manual database intervention to resolve. This effectively undermines the reliability of the ITSM platform as a source of truth for organizational assets and processes.
This vulnerability aligns with CWE-284 Improper Access Control, specifically reflecting failures in authorization logic where access decisions are not properly enforced before granting user requests. In terms of offensive security frameworks, this behavior corresponds to MITRE ATT&CK technique T1078 Valid Accounts, as it requires initial authentication but then exploits the lack of proper role-based restrictions to perform unauthorized actions. It also touches upon data manipulation aspects found in techniques related to resource hijacking or indirect object reference exploitation where the system fails to map user identity to specific resource permissions correctly. The flaw highlights a common pitfall in web application development where developers assume that authenticated sessions are sufficient for security, neglecting the necessity of granular permission checks on every state-changing operation.
To mitigate this vulnerability, organizations running affected versions of Combodo iTop must apply the official patch released by the vendor as soon as possible to update their installation to a version beyond 3.3.0 where these authorization checks have been reinforced. Until an upgrade is feasible, administrators should consider implementing network-level controls such as web application firewalls that can detect and block anomalous requests containing unusual class or key parameter patterns indicative of exploitation attempts. Additionally, reviewing user profiles to ensure the principle of least privilege is strictly enforced can reduce the blast radius if a successful exploit occurs by limiting which objects users are theoretically allowed to access even before the code flaw is addressed. Regular security audits focusing on role-based access control configurations and automated testing for broken object level authorization flaws should be integrated into the development lifecycle to prevent similar issues in future releases.