CVE-2025-37732 is a cross-site scripting (XSS) vulnerability classified under CWE-79 affecting Elastic Kibana versions 7.0.0 through 9.2.0. The flaw arises from improper neutralization of input during web page generation, specifically through the integration package upload functionality. An authenticated user can exploit this vulnerability by uploading crafted integration packages that contain malicious HTML tags, which are then rendered in the browsers of other users interacting with Kibana. This vulnerability bypasses a previous fix (ESA-2025-17, CVE-2025-25018) designed to prevent HTML injection, indicating a regression or incomplete remediation. The CVSS 3.1 base score is 5.4 (medium), reflecting that the attack vector is network-based with low attack complexity, requiring privileges (authenticated user) and user interaction to trigger the malicious payload. The impact includes limited confidentiality and integrity loss, as malicious scripts could steal session tokens, perform actions on behalf of users, or manipulate displayed data. Availability is not affected. No public exploits have been reported yet, but the vulnerability poses a risk in environments where Kibana is used for monitoring and analytics, especially in enterprise and critical infrastructure sectors. The vulnerability is particularly concerning because Kibana is widely deployed for visualizing Elasticsearch data, and an XSS flaw can facilitate lateral movement or data exfiltration within an organization.

For European organizations, this vulnerability could lead to unauthorized disclosure of sensitive information and manipulation of Kibana dashboards, potentially misleading decision-making processes. Since Kibana is often integrated into security monitoring and operational analytics, attackers exploiting this XSS flaw might gain footholds to escalate privileges or pivot within networks. The requirement for authenticated access limits exposure but does not eliminate risk, especially in large organizations with many users or where account compromise is possible. The partial confidentiality and integrity impact could affect compliance with data protection regulations like GDPR if personal or sensitive data is exposed. Additionally, disruption or manipulation of monitoring dashboards could impair incident response capabilities. The absence of known exploits reduces immediate risk but should not lead to complacency, as attackers may develop exploits once patches are released. Organizations relying heavily on Elastic Stack for critical infrastructure monitoring or business intelligence are particularly at risk.

1. Monitor Elastic's official channels for patches addressing CVE-2025-37732 and apply them promptly once available. 2. Until patches are released, restrict integration package upload permissions to the minimum necessary set of trusted users to reduce attack surface. 3. Implement strict input validation and sanitization on all user-supplied data related to integration packages, if customization is possible. 4. Deploy Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in Kibana web interfaces. 5. Conduct regular audits of user accounts and permissions to prevent unauthorized authenticated access. 6. Educate users about the risks of interacting with suspicious Kibana content and encourage reporting of anomalous behavior. 7. Consider network segmentation and access controls to isolate Kibana instances from less trusted networks. 8. Monitor Kibana logs for unusual upload or user activity that could indicate exploitation attempts. 9. Review and harden Kibana configuration settings to disable unnecessary features that could be leveraged for injection.