CVE-2026-66426 describes an unauthenticated Cross Site Scripting (XSS) vulnerability in WP-Stats affecting versions up to 2.56. The vulnerability allows attackers with no privileges to inject and execute arbitrary scripts in users' browsers, potentially leading to partial confidentiality, integrity, and availability impacts. The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality, integrity, and availability.

Successful exploitation can lead to execution of arbitrary scripts in the context of the victim's browser, potentially resulting in theft of sensitive information, session hijacking, or other malicious actions. The vulnerability impacts confidentiality, integrity, and availability to a low degree but is considered high severity due to ease of exploitation and unauthenticated access.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor the vendor's security advisories for updates and apply patches once available. Until then, consider implementing web application firewalls or other protective measures to mitigate exploitation risk.