Description
In WordPress before 4.7.3, there is authenticated Cross-Site Scripting (XSS) via Media File Metadata. This is demonstrated by both (1) mishandling of the playlist shortcode in the wp_playlist_shortcode function in wp-includes/media.php and (2) mishandling of meta information in the renderTracks function in wp-includes/js/mediaelement/wp-playlist.js.
Remediation
References
Related Vulnerabilities
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Atlassian Jira Incorrect Authorization Vulnerability (CVE-2019-8446)
IBM RTC Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2017-1509)
Django Uncontrolled Resource Consumption Vulnerability (CVE-2021-45115)