Description
WordPress Plugin Popup Builder-Responsive WordPress Pop up-Subscription & Newsletter is prone to multiple vulnerabilities, including cross-site scripting and security bypass. Exploiting these issues could allow an attacker to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site, to steal cookie-based authentication credentials, or to perform otherwise restricted actions and subsequently export a list of newsletter subscribers, reveal potentially sensitive system configuration information or grant themselves a number of permissions. WordPress Plugin Popup Builder-Responsive WordPress Pop up-Subscription & Newsletter version 3.63 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 3.64.1 or latest