Sandbox Breakout

Overview 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. Recommendation Upgrade to version 3.15...

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

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...

CVE-2021-21320

CVE-2021-21320 affects the matrix-react-sdk (Matrix React SDK) before version 3.15.0, where the user content sandbox could be abused to trigger opening unexpected documents. The issue involves a blob-origin handling scenario that, per sources, cannot access Matrix user data, so messages and secre...