CVE-2026-94411 in jshERP
Summary
by MITRE • 09/21/2026
jshERP 3.6 contains a privilege escalation vulnerability in the updateOneValueByKeyIdAndType endpoint that allows authenticated users to grant themselves arbitrary roles. Attackers can send a POST request with type=UserRole, their own user ID, and a role ID list to escalate from low-privilege tenant user to tenant administrator.
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Analysis
by VulDB Data Team • 09/21/2026
The vulnerability identified in jshERP version 3.6 represents a critical failure in server-side access control mechanisms, specifically within the updateOneValueByKeyIdAndType endpoint. This flaw allows authenticated users with lower privileges to escalate their permissions to those of a tenant administrator by manipulating input parameters during role assignment operations. The core technical issue stems from insufficient authorization checks on the backend API logic. When an authenticated user initiates a POST request to this specific endpoint, the server processes the payload without verifying whether the requesting user has the administrative authority required to modify role assignments for other users or themselves in a privileged manner. By supplying their own unique user identifier alongside a list of high-privilege role identifiers and specifying UserRole as the type parameter, an attacker can bypass standard permission boundaries. This lack of object-level authorization control enables the direct modification of security attributes associated with the attacker's account, effectively granting them administrative capabilities that were not originally assigned.
From an operational impact perspective, this privilege escalation vulnerability poses a severe risk to the integrity and confidentiality of data managed within the jshERP environment. Once an attacker achieves tenant administrator status, they gain unrestricted access to all modules, datasets, and configuration settings available to legitimate administrators. This includes the ability to view sensitive financial records, modify system configurations, create or delete other user accounts, and potentially install malicious plugins or integrations that could compromise the broader infrastructure. The impact extends beyond individual data breaches, as compromised administrative credentials can serve as a pivot point for further attacks against connected systems or networks. Furthermore, because the vulnerability relies on authenticated access, it is particularly dangerous in scenarios where attackers have already obtained valid user credentials through phishing, credential stuffing, or other initial compromise techniques.
This flaw aligns with CWE-269, which describes Improper Privilege Management, specifically highlighting cases where an actor can elevate their privileges beyond what was intended by the system design. In terms of offensive security frameworks, this vulnerability maps to MITRE ATT&CK technique T1078, Valid Accounts, as it leverages existing credentials, and more precisely relates to privilege escalation behaviors often seen in techniques like T1548, Abuse Elevation Control Mechanism, where an attacker exploits a flaw in the operating system or software's access control logic. The exploitation vector is straightforward, requiring only a single crafted HTTP POST request with specific parameters, which simplifies the attack process and increases the likelihood of successful compromise by automated tools or less sophisticated adversaries.
To mitigate this vulnerability, immediate action should be taken to apply any available patches from the jshERP vendor that address the authorization logic in the updateOneValueByKeyIdAndType endpoint. If patching is not immediately feasible, administrators can implement a temporary workaround by restricting access to this specific API endpoint using web application firewalls or reverse proxy configurations, allowing only requests originating from known administrative interfaces or IP ranges associated with trusted admin accounts. Additionally, implementing strict server-side validation that verifies the requester's current role against the requested action before processing any changes is essential. Developers should adopt a principle of least privilege in all backend services and ensure that every state-changing operation includes robust authorization checks to confirm that the user has explicit permission to perform the specific modification on the targeted resource. Regular security audits focusing on access control logic can help identify similar flaws across other endpoints within the application ecosystem.