FreeBSD: VID-C676BB1B-E3F8-11ED-B37B-901B0E9408DC (CVE-2023-30609): element-web -- matrix-react-sdk vulnerable to HTML injection in search results via plaintext message highlighting

matrix-react-sdk is a react-based SDK for inserting a Matrix chat/VoIP client into a web page. Prior to version 3.71.0, plain text messages containing HTML tags are rendered as HTML in the search results. To exploit this, an attacker needs to trick a user into searching for a specific message containing an HTML injection payload. No cross-site scripting attack is possible due to the hardcoded content security policy. Version 3.71.0 of the SDK patches over the issue. As a workaround, restarting the client will clear the HTML injection.