CVE-2026-65517 is an unauthenticated cross-site scripting (XSS) vulnerability classified under CWE-79 in the Easy PayPal Buy Now Button plugin by Scott Paterson. It affects all versions up to and including 2.0.4. The vulnerability arises from improper neutralization of input during web page generation, allowing attackers to inject malicious scripts that execute in the context of the victim's browser. The CVSS 3.1 base score is 7.1, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. No known exploits are reported in the wild, and no official patch or remediation level has been published yet.

Successful exploitation of this vulnerability can lead to execution of arbitrary scripts in the context of users visiting affected web pages, potentially resulting in data theft, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability of the affected system. The vulnerability is exploitable remotely without authentication but requires user interaction.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider applying temporary mitigations such as input validation or disabling the affected plugin if feasible. Monitor vendor channels for updates and apply patches promptly once available.