CVE-2025-2703 is a DOM-based Cross-Site Scripting (XSS) vulnerability identified in the built-in XY Chart plugin of Grafana versions 11.2.0 through 11.6.0. Grafana is a widely used open-source platform for monitoring and observability, often deployed in enterprise environments for visualizing time-series data. The vulnerability arises because a user with Editor permissions can modify the XY Chart panel in a way that allows arbitrary JavaScript execution within the context of the Grafana web application. This is classified under CWE-79, indicating improper neutralization of input during web page generation. The attack vector requires network access (AV:N), low attack complexity (AC:L), and privileges equivalent to an Editor role (PR:L), with user interaction (UI:R) needed to trigger the malicious script. The impact is primarily on confidentiality (high), with limited integrity and availability effects. Exploiting this vulnerability could allow an attacker to steal session tokens, perform actions on behalf of other users, or manipulate displayed data, potentially leading to further compromise within the Grafana environment. No known exploits are reported in the wild as of the publication date (April 23, 2025), and no official patches have been linked yet. The vulnerability scope is unchanged (S:U), meaning the impact is confined to the vulnerable component without affecting other system components directly.

For European organizations, the impact of CVE-2025-2703 can be significant, especially for those relying heavily on Grafana for critical infrastructure monitoring, industrial control systems, or cloud service observability. Successful exploitation could lead to unauthorized disclosure of sensitive monitoring data, session hijacking, or privilege escalation within the Grafana environment. This could disrupt operational visibility, delay incident response, or enable lateral movement in the network. Sectors such as finance, energy, telecommunications, and public administration, which often use Grafana for real-time analytics and dashboards, may face increased risks. The medium severity rating reflects that while the vulnerability requires Editor-level permissions and user interaction, the potential confidentiality impact is high. Given the collaborative nature of Grafana dashboards, an attacker exploiting this flaw could target users with higher privileges or sensitive access, amplifying the threat. Additionally, the lack of known exploits currently provides a window for proactive mitigation before widespread attacks occur.

1. Restrict Editor permissions strictly to trusted users only, minimizing the number of accounts that can modify XY Chart panels. 2. Implement strong access controls and multi-factor authentication (MFA) for all Grafana users to reduce the risk of compromised credentials. 3. Monitor and audit changes to dashboard panels, especially those involving the XY Chart plugin, to detect suspicious modifications. 4. Educate users about the risks of interacting with untrusted dashboards or links within Grafana to reduce the likelihood of triggering malicious scripts. 5. Until an official patch is released, consider disabling or restricting the use of the XY Chart plugin if feasible, or isolate Grafana instances in segmented network zones to limit exposure. 6. Employ Content Security Policy (CSP) headers tailored to Grafana to mitigate the impact of injected scripts. 7. Regularly update Grafana to the latest versions once patches addressing this vulnerability become available. 8. Use web application firewalls (WAFs) with rules tuned to detect and block suspicious JavaScript payloads targeting Grafana dashboards.