Description
WordPress Plugin Popup Maker-Popup for opt-ins, lead gen, & more is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input. An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks. WordPress Plugin Popup Maker-Popup for opt-ins, lead gen, & more version 1.16.4 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.16.5 or latest
References
https://sploitus.com/exploit?id=WPEX-ID:4D4709F3-AD38-4519-A24A-73BC04B20E52
https://plugins.svn.wordpress.org/popup-maker/trunk/readme.txt
Related Vulnerabilities
WordPress Plugin Contact Form DB Cross-Site Scripting (2.8.27)
WordPress Plugin WP Email Template HTML Injection (2.2.10)
WordPress Plugin WP Custom Admin Interface PHP Object Injection (7.28)
SugarCRM Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2019-17302)
WordPress Plugin All-in-One Event Calendar Multiple Vulnerabilities (2.3.12)