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 Permissions, Privileges, and Access Controls Vulnerability (CVE-2011-3129)
PHP Improper Input Validation Vulnerability (CVE-2015-4598)
MySQL CVE-2016-5630 Vulnerability (CVE-2016-5630)
WordPress Plugin WordPress Landing Pages SQL Injection (1.2.1)
WordPress Plugin Contact Form Email Cross-Site Scripting (1.3.24)