The Daniel Iser Popup Maker plugin versions up to 1.20.2 suffer from a stored cross-site scripting vulnerability due to improper input neutralization during web page generation. This flaw 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 CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, user interaction needed, and scope changed.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of users viewing the affected popup content, potentially leading to limited data disclosure, modification, or disruption of availability. The impact is rated medium, reflecting limited but non-negligible confidentiality, integrity, and availability consequences. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider restricting privileges for users who can input data into the Popup Maker plugin and apply any available temporary mitigations recommended by the vendor. Monitor for updates from Daniel Iser regarding patches or official workarounds.