CVE-2016-4566: Plupload

Medium severity, CVSS 6.1. EPSS: 6% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in plupload.flash.swf in Plupload before 2.1.9, as used in WordPress before 4.5.2, allows remote attackers to inject arbitrary web script or HTML via a Same-Origin Method Execution (SOME) attack.

Affected products

• Plupload Plupload: up to and including 2.1.8
• WordPress WordPress: up to and including 4.5.1

Published 2016-05-22. Last modified 2026-06-17.