GHSA-52mq-6jcv-j79x
User content sandbox can be confused into opening arbitrary documents
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | matrix-react-sdk | < 3.15.0 | 3.15.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
The user content sandbox can be abused to trick users into opening unexpected documents after several user interactions. The content can be opened with a `blob` origin from the Matrix client, so it is possible for a malicious document to access user messages and secrets.
### Patches
This has been fixed by https://github.com/matrix-org/matrix-react-sdk/pull/5657, which is included in 3.15.0.
### Workarounds
There are no known workarounds.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-52mq-6jcv-j79x
- https://nvd.nist.gov/vuln/detail/CVE-2021-21320
- https://github.com/matrix-org/matrix-react-sdk/pull/5657
- https://github.com/matrix-org/matrix-react-sdk/commit/b386f0c73b95ecbb6ea7f8f79c6ff5171a8dedd1
- https://www.npmjs.com/package/matrix-react-sdk