CVE-2025-43002 is a medium-severity vulnerability affecting SAP S4/HANA, specifically the S4CORE component versions 102 through 106. The vulnerability arises from an external control of an assumed-immutable web parameter within the OData meta-data property. Due to a missing authorization check, an authenticated attacker with at least low-level privileges (PR:L) can access restricted information that should otherwise be protected. The vulnerability does not impact the integrity or availability of the application, but it does pose a risk to confidentiality by potentially exposing sensitive data. The attack vector is network-based (AV:N), and no user interaction is required (UI:N), making exploitation feasible remotely once authenticated. The vulnerability is classified under CWE-472, which involves external control of an assumed-immutable parameter, indicating that the application incorrectly trusts a parameter that can be manipulated by an attacker. No known exploits are currently reported in the wild, and no patches have been linked yet, suggesting that organizations should prioritize monitoring and prepare for remediation once patches become available. The CVSS v3.1 base score is 4.3, reflecting the limited confidentiality impact and the requirement for authentication.

For European organizations, the impact of CVE-2025-43002 primarily concerns the confidentiality of sensitive business data processed within SAP S4/HANA environments. Given SAP's widespread adoption in Europe across industries such as manufacturing, finance, logistics, and public sector, unauthorized access to restricted information could lead to data leakage, compliance violations (e.g., GDPR), and potential competitive disadvantages. Although integrity and availability are unaffected, the exposure of confidential data could facilitate further targeted attacks or insider threats. Organizations handling critical or sensitive data should be particularly cautious, as even limited data exposure can have regulatory and reputational consequences. The requirement for authentication limits the risk to insiders or compromised accounts, but this also underscores the importance of strong identity and access management controls within SAP landscapes.

To mitigate this vulnerability, European organizations should implement the following specific measures: 1) Immediately review and tighten authorization policies within SAP S4/HANA, ensuring that access controls on OData services and meta-data properties are strictly enforced and audited. 2) Monitor SAP system logs for unusual access patterns or attempts to query OData meta-data properties, focusing on authenticated users with low privileges. 3) Enforce strong authentication mechanisms, including multi-factor authentication (MFA), to reduce the risk of account compromise. 4) Limit the number of users with access to SAP S4CORE components and regularly review user roles and permissions. 5) Stay alert for SAP security advisories and apply patches promptly once SAP releases fixes for this vulnerability. 6) Consider deploying SAP-specific security tools or third-party solutions that can detect and block unauthorized OData queries or parameter tampering. 7) Conduct regular security assessments and penetration testing focused on SAP OData interfaces to identify and remediate similar authorization weaknesses proactively.