CVE-2025-26660 in Fiori Apps
Summary
by MITRE • 03/11/2025
SAP Fiori applications using the posting library fail to properly configure security settings during the setup process, leaving them at default or inadequately defined. This vulnerability allows an attacker with low privileges to bypass access controls within the application, enabling them to potentially modify data. Confidentiality and Availability are not impacted.
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Analysis
by VulDB Data Team • 03/11/2025
SAP Fiori applications leverage the posting library as a core component for transaction processing and data manipulation within enterprise environments. The vulnerability identified as CVE-2025-26660 stems from inadequate security configuration during the initial setup phase of these applications. This flaw represents a critical misconfiguration issue that directly impacts the application's access control mechanisms, creating a pathway for unauthorized data modification attempts. The vulnerability specifically affects the security settings configuration process within the posting library component, which serves as the foundation for financial and operational transaction handling in SAP Fiori environments.
The technical flaw manifests when the application fails to properly establish security boundaries during deployment, resulting in default security configurations that may not align with organizational security policies. This misconfiguration creates an environment where users with minimal privileges can potentially bypass intended access controls, exploiting the weak security posture to perform unauthorized operations within the application. The vulnerability is classified under CWE-754, which addresses improper check for a race condition, and specifically relates to CWE-284, which deals with improper access control mechanisms. The flaw operates at the application configuration level rather than at the code execution level, making it particularly insidious as it requires minimal technical expertise to exploit.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it creates a persistent risk for data integrity within SAP Fiori applications. Attackers can leverage this weakness to modify transaction records, potentially altering financial data, inventory levels, or operational metrics without detection. The vulnerability's low privilege requirement means that even users with basic access rights can exploit the flaw, making it particularly dangerous in environments where role-based access controls are not properly enforced. This weakness undermines the principle of least privilege and can lead to significant business disruption, regulatory compliance issues, and potential financial losses. The impact is primarily focused on integrity rather than confidentiality or availability, though the data modification capabilities can indirectly affect availability through system instability or audit trail corruption.
Mitigation strategies for CVE-2025-26660 require immediate attention to the security configuration process within SAP Fiori applications. Organizations should implement comprehensive security hardening procedures during application deployment, ensuring that all security settings are explicitly configured according to organizational security policies. The remediation process involves reviewing and updating the posting library security configurations to enforce proper access controls, implementing explicit permission checks, and establishing automated validation processes to verify security settings during deployment. Security teams should also implement monitoring solutions to detect unauthorized access attempts and establish regular security configuration audits. This vulnerability aligns with ATT&CK technique T1078.004, which covers legitimate credentials in cloud environments, and T1566.001, related to spearphishing via social media, as attackers may exploit the weak security posture to gain unauthorized access to sensitive data. Organizations should also consider implementing additional controls such as privilege management solutions, regular security assessments, and comprehensive user access reviews to prevent exploitation of this configuration weakness.