Description
WordPress is prone to a prototype pollution vulnerability. Exploiting this issue could allow an attacker to inject key/value �properties� into JavaScript objects, potentially allowing for execution of arbitrary JavaScript in a user�s session if they can trick that user into clicking a link. WordPress versions 4.5.x ranging from 4.5 and up to (and including) 4.5.25 are vulnerable.
Remediation
Update to WordPress version 4.5.26 or latest
References
https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-query-object.md
https://wordpress.org/support/wordpress-version/version-4-5-26/
Related Vulnerabilities
PHP Integer Overflow or Wraparound Vulnerability (CVE-2016-5769)
Plone CMS Permissions, Privileges, and Access Controls Vulnerability (CVE-2016-4043)
Apache Tomcat Improper Resource Shutdown or Release Vulnerability (CVE-2017-5650)
WordPress Plugin Rezgo Online Booking Cross-Site Scripting (1.8.6)
WordPress Plugin Product Catalog for WordPress Unspecified Vulnerability (1.4.5)