The ARS Affiliate Page Plugin for WordPress suffers from a reflected XSS vulnerability via the 'utm_keyword' parameter due to improper neutralization of input during web page generation (CWE-79). This allows unauthenticated attackers to inject malicious scripts that execute when a victim interacts with a crafted URL. The issue affects all versions up to and including 2.0.2. The CVSS 3.1 base score is 6.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, no privileges required, user interaction needed, scope changed, and low impact on confidentiality and integrity with no impact on availability. No patch or vendor advisory confirming remediation is currently available.

Successful exploitation can lead to execution of arbitrary scripts in the context of the victim's browser session, potentially resulting in information disclosure and integrity impacts limited to the affected web application context. There is no impact on availability. The vulnerability requires user interaction and can be triggered remotely without authentication.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling or removing the ARS Affiliate Page Plugin or applying any available temporary mitigations recommended by the vendor. Additionally, users should exercise caution when clicking on suspicious links that may exploit this vulnerability.