Description
WordPress is prone to a cross-domain Flash injection vulnerability. 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, allowing the attacker to steal cookie-based authentication credentials, or to fool a user into inserting credentials on a fake Flash form. WordPress versions ranging from 0.70 and up to (and including) 3.6.1 are vulnerable.
Remediation
Update to WordPress version 4.9.2 or latest
References
https://opnsec.com/2017/10/cve-2016-9263-unpatched-xsf-vulnerability-in-wordpress/
https://opnsec.com/2017/10/flashme-wordpress-vulnerability-disclosure-cve-2016-9263/
https://wordpress.org/news/2018/01/wordpress-4-9-2-security-and-maintenance-release/
Related Vulnerabilities
Joomla Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2012-0837)
Oracle JRE CVE-2014-2397 Vulnerability (CVE-2014-2397)
WordPress Plugin AskApache Firefox Adsense Cross-Site Request Forgery (3.0)
WordPress Plugin WP-Members Membership Cross-Site Request Forgery (3.2.7)
WordPress Plugin Google AdSense Click-Fraud Monitoring Cross-Site Scripting (1.8.6)