GHSA-277W-QPXR-2549 MediaElement Vulnerable to Reflected XSS

Cross-site scripting XSS vulnerability in flash/FlashMediaElement.swf in MediaElement.js before 2.21.0, as used in WordPress before 4.5.2, allows remote attackers to inject arbitrary web script or HTML via an obfuscated form of the jsinitfunction parameter, as demonstrated by "jsinitfunctio%gn."...