CVE-2024-30054 is a medium-severity vulnerability identified in the Microsoft Power BI Client JavaScript SDK version 2.0.0. The root cause is improper input validation (CWE-20), which can lead to information disclosure. Specifically, the vulnerability arises because the SDK does not adequately validate or sanitize input data, potentially allowing an attacker to craft malicious inputs that cause the SDK to expose sensitive information. The vulnerability is exploitable remotely over the network (AV:N), requires no privileges (PR:N), but does require user interaction (UI:R), such as a user visiting a maliciously crafted web page or interacting with a compromised application embedding the vulnerable SDK. The scope is unchanged (S:U), meaning the impact is limited to the vulnerable component without affecting other system components. The confidentiality impact is high (C:H), indicating that sensitive data could be disclosed, but integrity and availability are not affected (I:N, A:N). The exploitability is rated as low complexity (AC:L), and no known exploits are currently in the wild. The vulnerability was published on May 14, 2024, and is tracked under CWE-20, which relates to improper input validation, a common source of security issues. Since this SDK is used in web applications embedding Power BI visualizations or reports, an attacker could leverage this flaw to extract sensitive data from the client-side environment or from embedded reports, potentially exposing business intelligence data that should remain confidential. The lack of a patch link suggests that remediation may still be pending or that users must update to a fixed version once released.

For European organizations, the impact of this vulnerability could be significant, especially for enterprises relying heavily on Microsoft Power BI for data analytics and reporting. Information disclosure could lead to leakage of sensitive business intelligence, financial data, or personally identifiable information (PII), which may violate GDPR and other data protection regulations. This could result in regulatory fines, reputational damage, and loss of competitive advantage. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be used to trick employees into triggering the exploit. Sectors such as finance, healthcare, manufacturing, and government agencies that use Power BI dashboards extensively are at higher risk. Additionally, organizations embedding the vulnerable SDK in customer-facing portals or internal dashboards could inadvertently expose sensitive data to unauthorized users. The medium severity rating indicates that while the vulnerability is not critical, it still poses a tangible risk that must be addressed promptly to prevent data breaches.

Monitor Microsoft’s official channels for patches or updates addressing CVE-2024-30054 and apply them immediately upon release. If an immediate patch is unavailable, consider temporarily disabling or removing the use of PowerBI-client JS SDK version 2.0.0 in web applications, or restrict access to affected dashboards to trusted users only. Implement strict Content Security Policy (CSP) headers to limit the execution of untrusted scripts and reduce the risk of malicious input triggering the vulnerability. Conduct thorough input validation and sanitization on all data passed to the PowerBI-client SDK within your applications, adding an additional layer of defense beyond the SDK’s internal checks. Educate users about phishing and social engineering risks to reduce the likelihood of user interaction that could trigger exploitation. Use network-level controls such as Web Application Firewalls (WAFs) to detect and block suspicious requests targeting the vulnerable SDK endpoints. Review and audit embedded Power BI reports and dashboards for exposure of sensitive data, minimizing data exposure to only what is necessary. Implement robust logging and monitoring to detect unusual access patterns or data exfiltration attempts related to Power BI usage.