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 4.9.x ranging from 4.9 and up to (and including) 4.9.19 are vulnerable.
Remediation
Update to WordPress version 4.9.20 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-4-9-20/
Related Vulnerabilities
Oracle JRE CVE-2013-0443 Vulnerability (CVE-2013-0443)
MySQL CVE-2017-3265 Vulnerability (CVE-2017-3265)
OpenSSL Other Vulnerability (CVE-2004-0081)
WordPress Plugin Calendar Event Multi View Multiple SQL Injection Vulnerabilities (1.1.7)
WordPress Plugin WP to Twitter Cross-Site Request Forgery (3.2.9)