CVE-2025-4647 is a high-severity vulnerability classified under CWE-79, which pertains to Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This vulnerability affects multiple versions of Centreon web, a widely used IT infrastructure monitoring software. Specifically, versions from 22.10.0 up to but not including 22.10.29, 23.04.0 up to 23.04.27, 23.10.0 up to 23.10.22, 24.04.0 up to 24.04.11, and 24.10.0 up to 24.10.5 are impacted. The flaw allows a user with elevated privileges to bypass existing sanitization controls by manipulating the content of an existing SVG (Scalable Vector Graphics) element. This manipulation leads to reflected XSS, where malicious scripts can be injected and executed in the context of the victim's browser session. The CVSS 3.1 base score of 8.4 reflects the critical nature of this vulnerability, with an attack vector that is network-based (AV:N), low attack complexity (AC:L), but requiring high privileges (PR:H) and user interaction (UI:R). The scope is changed (S:C), indicating that the vulnerability affects resources beyond the initially vulnerable component. The impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H), meaning an attacker could steal sensitive information, alter data, or disrupt service availability. No known exploits in the wild have been reported yet, but the vulnerability’s characteristics make it a significant risk, especially in environments where Centreon web is used to monitor critical infrastructure. The lack of patch links suggests that users should monitor Centreon’s official channels for updates or apply interim mitigations.

For European organizations, the impact of CVE-2025-4647 can be substantial. Centreon is widely deployed across Europe in sectors such as telecommunications, finance, government, and critical infrastructure monitoring due to its robust IT monitoring capabilities. Exploitation of this vulnerability could allow attackers to execute arbitrary scripts within the context of authenticated users with elevated privileges, potentially leading to session hijacking, credential theft, or unauthorized command execution. This could compromise the integrity and availability of monitoring data, leading to undetected outages or false alarms, which in turn could disrupt business operations or critical services. Given the high confidentiality impact, sensitive operational data could be exposed, violating GDPR and other data protection regulations. The requirement for elevated privileges limits the attack surface but also means that insider threats or compromised administrative accounts could be leveraged for exploitation. The reflected XSS nature also implies that social engineering or phishing could be used to trick legitimate users into triggering the malicious payload, increasing the risk of successful attacks.

To mitigate CVE-2025-4647 effectively, European organizations should: 1) Immediately audit and restrict administrative access to Centreon web, ensuring that only necessary personnel have elevated privileges. 2) Implement strict input validation and sanitization policies on SVG content and other user-controllable inputs, potentially using web application firewalls (WAFs) configured to detect and block XSS payloads targeting SVG elements. 3) Monitor Centreon’s official security advisories closely and apply patches as soon as they become available. 4) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts within the Centreon web interface. 5) Conduct regular security awareness training to reduce the risk of social engineering attacks that could trigger reflected XSS. 6) Use multi-factor authentication (MFA) for all users with elevated privileges to reduce the risk of account compromise. 7) Review and harden network segmentation to limit access to Centreon web interfaces from untrusted networks. 8) Perform regular security testing, including penetration testing focused on XSS vulnerabilities, to identify and remediate any residual weaknesses.