CVE-2025-60936 is a Cross-Site Scripting (XSS) vulnerability identified in Emoncms version 11.7.3, a popular open-source energy monitoring and IoT data visualization platform. The vulnerability arises from improper input handling in the application’s logging mechanism, allowing authenticated attackers with API access to inject malicious JavaScript code. When an administrator subsequently views the application logs, the injected script executes in their browser context. This attack vector leverages the trust relationship between the administrator’s browser and the application, potentially enabling theft of session tokens, unauthorized actions, or further compromise of administrative functions. The vulnerability requires the attacker to have API access, which implies some level of authentication but does not require elevated privileges beyond that. The CVSS 3.1 base score is 6.1, reflecting a medium severity with network attack vector, low attack complexity, no privileges required, but requiring user interaction (administrator viewing logs). The scope is changed because the vulnerability affects the administrator’s session context, potentially impacting confidentiality and integrity of the system. No patches or known exploits are currently available, indicating the vulnerability is newly disclosed. The CWE-79 classification confirms this is a classic reflected/stored XSS issue. The lack of patch links suggests that organizations must implement interim mitigations while awaiting official fixes.

For European organizations, especially those involved in energy management, smart grids, or IoT deployments using Emoncms, this vulnerability poses a risk to administrative control and data confidentiality. Successful exploitation could lead to session hijacking of administrators, unauthorized changes to system configurations, or exposure of sensitive operational data. Since the attack requires API access, organizations with exposed or weakly secured APIs are at higher risk. The impact is primarily on confidentiality and integrity, with no direct availability impact. Given the critical role of energy monitoring in infrastructure and industrial environments, exploitation could facilitate further attacks or espionage. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once the vulnerability is public. European entities with regulatory requirements for data protection (e.g., GDPR) must consider the compliance implications of such a vulnerability being exploited.

1. Restrict API access strictly to trusted users and networks, employing strong authentication and authorization controls. 2. Implement input validation and output encoding on all data accepted via the API to prevent injection of malicious scripts. 3. Monitor application logs and API usage for anomalous or suspicious activity indicative of injection attempts. 4. Limit the number of administrators who have access to view logs and ensure they use updated browsers with security features enabled. 5. Employ Content Security Policy (CSP) headers to reduce the impact of potential XSS payloads. 6. Segregate administrative interfaces from general user interfaces to minimize exposure. 7. Stay updated with Emoncms security advisories and apply patches promptly once available. 8. Consider deploying Web Application Firewalls (WAFs) with rules to detect and block XSS attempts targeting the logging endpoints.