This vulnerability in Popup Maker WP (<= 1.3.6) involves improper input sanitization leading to stored cross-site scripting (XSS). An attacker can inject malicious scripts that persist within the popup content and execute when viewed by other users. The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring privileges and user interaction, with a scope change and partial impacts on confidentiality, integrity, and availability.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of users viewing the affected popups, potentially leading to session hijacking, defacement, or other malicious actions impacting confidentiality, integrity, and availability of the affected system. However, no known active exploits have been reported to date.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider limiting privileges and user interactions that could trigger the vulnerability. Monitor official Popup Maker channels for updates and apply patches promptly once released.