CVE-2021-21480 in MII
Summary
by MITRE • 03/10/2021
SAP MII allows users to create dashboards and save them as JSP through the SSCE (Self Service Composition Environment). An attacker can intercept a request to the server, inject malicious JSP code in the request and forward to server. When this dashboard is opened by Users having at least SAP_XMII_Developer role, malicious content in the dashboard gets executed, leading to remote code execution in the server, which allows privilege escalation. The malicious JSP code can contain certain OS commands, through which an attacker can read sensitive files in the server, modify files or even delete contents in the server thus compromising the confidentiality, integrity and availability of the server hosting the SAP MII application.
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Analysis
by VulDB Data Team • 05/06/2025
SAP MII or SAP Manufacturing Intelligence represents a critical vulnerability through CVE-2021-21480 that exploits a fundamental flaw in the Self Service Composition Environment SSCE component. This vulnerability specifically targets the dashboard creation functionality where users can save dashboards as JSP files, creating an attack surface that enables unauthorized code execution. The flaw manifests when an attacker intercepts legitimate requests to the server and injects malicious JSP code directly into the request payload before forwarding it to the target server. This technique leverages man-in-the-middle attack patterns and represents a sophisticated exploitation vector that bypasses normal authentication mechanisms.
The technical exploitation of this vulnerability requires minimal privileges but achieves maximum impact through the SSCE dashboard saving functionality. When users with at least the SAP_XMII_Developer role access the compromised dashboard, the embedded malicious JSP code executes within the server context, providing attackers with full remote code execution capabilities. This privilege escalation occurs because the server processes the saved dashboard content without adequate input validation or sanitization of the JSP code. The vulnerability aligns with CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" and demonstrates how insufficient input validation can lead to arbitrary code execution in web applications.
The operational impact of this vulnerability extends far beyond simple code execution, as the malicious JSP code can contain OS commands that enable attackers to perform comprehensive system compromise operations. Attackers can leverage this capability to read sensitive files from the server filesystem, modify critical application components, or even delete essential system contents. This multi-faceted attack vector directly compromises the confidentiality, integrity, and availability principles of information security, making it a severe threat to SAP MII environments. The vulnerability essentially transforms a legitimate dashboard creation feature into a weaponized attack channel that can be exploited by attackers with relatively low privileges.
Organizations must implement comprehensive mitigations to address this vulnerability, starting with immediate patching of affected SAP MII versions and implementing network-level controls to prevent unauthorized request interception. The security architecture should include strict input validation for all dashboard creation processes, particularly when handling JSP content, and implement proper access controls that limit who can create and execute dashboards. Additionally, network monitoring should be enhanced to detect anomalous request patterns that might indicate injection attempts, and regular security assessments should verify that no malicious dashboards have been created or persisted in the system. This vulnerability demonstrates the critical importance of securing all user-facing application components that handle dynamic content generation, as these areas often represent the most attractive targets for attackers seeking to establish persistent access to enterprise systems.