The NotificationX WordPress plugin is vulnerable to a DOM-based XSS via the 'nx-preview' POST parameter due to improper input neutralization during web page generation. This allows unauthenticated attackers to inject arbitrary scripts that execute in the context of users visiting a malicious page that auto-submits a form to the vulnerable site. The vulnerability affects all versions up to and including 3.2.0 and is classified under CWE-79. The CVSS v3.1 base score is 7.2, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, scope change, and low impact on confidentiality and integrity.

Successful exploitation can lead to execution of arbitrary scripts in the victim's browser, potentially allowing theft of sensitive information, session hijacking, or other malicious actions within the context of the affected site. The vulnerability does not impact availability. There are no known exploits in the wild as of the published date.

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 restricting access to the vulnerable functionality if possible. Monitor the vendor's channels for updates and apply patches promptly once released.