CVE-2021-21320 – User content sandbox can be confused into opening arbitrary documents

https://notcve.org/view.php?id=CVE-2021-21320

matrix-react-sdk is an npm package which is a Matrix SDK for React Javascript. In matrix-react-sdk before version 3.15.0, the user content sandbox can be abused to trick users into opening unexpected documents. The content is opened with a `blob` origin that cannot access Matrix user data, so messages and secrets are not at risk. This has been fixed in version 3.15.0. matrix-react-sdk es un paquete npm que es un Matrix SDK para React Javascript. En matrix-react-sdk anterior a la versión 3.15.0, el sandbox del contenido del usuario puede ser abusado para engañar a los usuarios para que abran documentos inesperados. • https://github.com/matrix-org/matrix-react-sdk/commit/b386f0c73b95ecbb6ea7f8f79c6ff5171a8dedd1 https://github.com/matrix-org/matrix-react-sdk/pull/5657 https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-52mq-6jcv-j79x https://www.npmjs.com/package/matrix-react-sdk • CWE-345: Insufficient Verification of Data Authenticity •