The WP GoToWebinar plugin by Martin Gibson suffers from a stored XSS vulnerability (CWE-79) due to improper input neutralization during web page generation. This allows attackers with at least low privileges and requiring user interaction to inject malicious scripts that can impact confidentiality, integrity, and availability to a limited extent. The vulnerability affects all versions up to 15.7. No vendor advisory or patch information is currently provided, and no known active exploitation has been reported.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected website's users, potentially leading to session hijacking, defacement, or other malicious actions impacting confidentiality, integrity, and availability. The CVSS vector indicates network attack vector, low attack complexity, low privileges required, user interaction required, and scope change, with partial impact on confidentiality, integrity, and availability.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting user input capabilities or applying web application firewall (WAF) rules to detect and block malicious payloads related to stored XSS in WP GoToWebinar. Monitor vendor channels for updates and apply patches promptly once available.