Description
WordPress Plugin Unlimited Pop-Ups is prone to multiple cross-site scripting vulnerabilities because it fails to properly sanitize user-supplied input. An attacker may leverage these issues 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 Unlimited Pop-Ups version 1.4.3 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.4.4 or latest
References
https://0x62626262.wordpress.com/2016/04/21/unlimited-pop-ups-wordpress-plugin-xss-vulnerability/
http://seclists.org/bugtraq/2016/Apr/134
http://codecanyon.net/item/unlimited-popups-wordpress-plugin/8575498
Related Vulnerabilities
WordPress Plugin The Welcomizer 'twiz-index.php' Cross-Site Scripting (1.3.9.4)
Plone CMS Resource Management Errors Vulnerability (CVE-2012-5506)
WordPress Plugin Contact Bank-Contact Form Builder for WordPress Cross-Site Scripting (2.0.69)
IBM RTC Improper Input Validation Vulnerability (CVE-2015-1928)