CVE-2025-42899

Vulnerability

Overview

CVE-2025-42899 is an authorization bypass in SAP S4CORE's "Manage journal entries" component. The application does not perform the necessary authorization checks for an authenticated user, allowing the user to perform actions that should be restricted. This flaw stems from missing or insufficient access control enforcement on the server side, a common class of vulnerability in enterprise resource planning (ERP) systems where role-based permissions are not consistently validated.

Exploitation

Conditions

An attacker must first have a valid authenticated session in the SAP S4CORE system. No special privileges are required beyond a standard user account. The attack can be carried out over the network by sending crafted requests to the journal entry management endpoint. Because the missing check occurs at the application layer, no additional authentication or physical access is needed. The CVSS v3 base score of 4.3 (Medium) reflects the low attack complexity and low complexity and the requirement for authentication.

Impact

Successful exploitation leads to escalation of privileges, meaning the authenticated user can access or modify journal entries that should be off-limits according to their assigned to their role. The official description states this has a low impact on confidentiality, with no impact on integrity or availability. Therefore, an attacker could view sensitive financial data (e.g., accounting entries, vendor details) but cannot alter or delete records, nor disrupt system availability. service.

Mitigation

SAP has addressed this vulnerability in its monthly Security Patch Day [1]. Customers should apply the relevant SAP Security Note for their S4CORE version. SAP recommends implementing all Patch Day Security Notes at priority [1]. No workarounds are documented; the fix is delivered via support packages. Organizations running affected versions should prioritize patching to prevent unauthorized data exposure.