CVE-2026-51923 in docuForm
Summary
by MITRE • 07/10/2026
An Insecure Direct Object Reference (IDOR) vulnerability exists in docuForm GmbH Client v.11.11c allowing a remote attacker to execute arbitrary code via the user settings component, and modify or retrieve sensitive data associated with other users’ accounts.
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Analysis
by VulDB Data Team • 07/10/2026
The identified vulnerability represents a critical insecure direct object reference flaw within the docuForm GmbH Client version 11.11c software system. This weakness stems from insufficient authorization checks and improper access control mechanisms that allow malicious actors to directly manipulate object references without proper validation. The vulnerability specifically manifests within the user settings component where the application fails to verify whether an authenticated user has legitimate access rights to modify or retrieve data associated with other user accounts. Such a flaw fundamentally undermines the principle of least privilege and creates pathways for unauthorized data access and manipulation.
The technical exploitation of this IDOR vulnerability occurs when a remote attacker crafts malicious requests that target specific object identifiers within the user settings functionality. According to CWE-284, this represents a direct violation of access control mechanisms where the application relies on predictable or guessable identifiers rather than implementing proper authorization checks. The attacker can potentially enumerate user accounts by manipulating parameters in API calls or web requests, thereby gaining access to sensitive information belonging to other users. This vulnerability enables arbitrary code execution capabilities when combined with the user settings component, allowing attackers to modify system configurations and potentially escalate their privileges within the application environment.
The operational impact of this vulnerability extends beyond simple data exposure to encompass full system compromise potential through lateral movement and privilege escalation. Attackers can leverage this weakness to access confidential user information including personal data, documents, and system configurations that should remain isolated between users. The implications are particularly severe in enterprise environments where multiple users interact with the docuForm client, as it creates opportunities for data breaches, insider threat exploitation, and unauthorized administrative actions. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques and credential access patterns, enabling adversaries to move laterally within the system and maintain persistent access.
Mitigation strategies should focus on implementing robust input validation and authorization checks throughout the application architecture. The software must enforce proper access control mechanisms that validate user permissions before processing any object references, ensuring that each request is authenticated against the requesting user's privileges. Security measures should include parameterized queries to prevent direct object manipulation, implementation of randomized or non-guessable identifiers for user objects, and comprehensive logging of access attempts. Additionally, regular security testing including penetration testing and code reviews should be conducted to identify similar vulnerabilities in other components. The remediation process must address the root cause by strengthening the authorization framework within the user settings component and implementing proper object-level access controls that align with established security standards such as those outlined in NIST SP 800-53 for access control requirements.