Description WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement). Remediation References CVE-2018-5776 Related Vulnerabilities WordPress Plugin Football Pool Arbitrary File Upload (2.6.3) WordPress Configuration Vulnerability (CVE-2009-2335) WordPress Plugin File Manager Unspecified Vulnerability (2.2.0) WordPress Plugin WP Fastest Cache Directory Traversal (0.9.1.6) Dolibarr Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2021-25955) Severity Medium Classification CVE-2018-5776 CWE-707 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Tags Missing Update Known Vulnerabilities