CVE-2025-8430 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79, found in Centreon Infra Monitoring's Commands Connectors configuration modules. This vulnerability arises from improper neutralization of input during web page generation, allowing malicious scripts submitted by users with elevated privileges to be stored and later executed in the browsers of other users who access the affected pages. The affected versions include 23.10.0 before 23.10.28, 24.04.0 before 24.04.18, and 24.10.0 before 24.10.13. The vulnerability has a CVSS 3.1 base score of 6.8, reflecting medium severity with a vector indicating network attack vector (AV:N), low attack complexity (AC:L), required privileges are high (PR:H), no user interaction (UI:N), scope changed (S:C), confidentiality impact high (C:H), and no impact on integrity (I:N) or availability (A:N). This means an attacker with elevated privileges can remotely inject malicious scripts that compromise the confidentiality of other users' sessions or data, potentially leading to session hijacking or data exfiltration. The scope change indicates that the vulnerability affects resources beyond the initially vulnerable component. No public exploits have been reported yet, but the presence of stored XSS in a monitoring platform used for critical infrastructure increases the risk profile. The vulnerability is particularly concerning because it requires elevated privileges, implying that insider threats or compromised administrative accounts could exploit it. Centreon Infra Monitoring is widely used in IT infrastructure monitoring, including in European enterprises and critical infrastructure sectors, making this vulnerability relevant for organizations relying on this software for operational visibility and control.

For European organizations, the impact of CVE-2025-8430 can be significant, especially those in sectors relying heavily on Centreon Infra Monitoring for critical infrastructure and IT operations. Successful exploitation could lead to unauthorized disclosure of sensitive monitoring data, session hijacking of privileged users, and potential lateral movement within the network. Confidentiality is primarily at risk, as attackers could steal credentials or sensitive configuration details. Although integrity and availability are not directly impacted, the indirect effects of compromised monitoring systems could disrupt incident response and operational awareness. Given the elevated privileges required, the threat is more likely to arise from insider threats or attackers who have already gained administrative access. European organizations with strict data protection regulations (e.g., GDPR) could face compliance risks if sensitive data is exposed. The vulnerability could also undermine trust in monitoring systems, delaying detection of other cyber threats. The lack of known exploits in the wild reduces immediate risk but does not eliminate the need for urgent remediation.

To mitigate CVE-2025-8430, European organizations should: 1) Immediately apply the vendor-released patches for Centreon Infra Monitoring versions 23.10.28, 24.04.18, and 24.10.13 or later to remediate the vulnerability. 2) Restrict administrative and elevated privilege access to trusted personnel only, enforcing strong authentication mechanisms such as multi-factor authentication (MFA). 3) Conduct regular audits of user privileges and review logs for suspicious activities to detect potential misuse of elevated accounts. 4) Implement Content Security Policy (CSP) headers on the web application to limit the execution of unauthorized scripts and reduce the impact of XSS attacks. 5) Employ web application firewalls (WAFs) with rules tuned to detect and block XSS payloads targeting Centreon interfaces. 6) Educate administrators on the risks of stored XSS and safe input handling practices. 7) Monitor Centreon Infra Monitoring logs and network traffic for anomalous behavior indicative of exploitation attempts. 8) Consider network segmentation to isolate monitoring infrastructure from less trusted network zones to limit attack surface. These steps go beyond generic advice by focusing on access control, layered defenses, and proactive monitoring tailored to the nature of this vulnerability.