This vulnerability in Lester Chan's WP-Stats plugin (versions <= 2.56) is an unauthenticated cross-site scripting (XSS) flaw categorized under CWE-79. It arises from improper neutralization of input during web page generation, allowing remote attackers to execute arbitrary scripts in the context of the affected web application. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality, integrity, and availability.

Successful exploitation could allow an unauthenticated attacker to execute arbitrary scripts in the context of the victim's browser, potentially leading to information disclosure, session hijacking, or other client-side impacts. The vulnerability affects the confidentiality, integrity, and availability of the affected system to a limited extent as indicated by the CVSS vector.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling or limiting use of the affected WP-Stats plugin versions and apply web application firewall (WAF) rules to detect and block XSS attempts targeting this plugin.