Medium severity4.2NVD Advisory· Published May 17, 2021· Updated Jun 17, 2026
CVE-2021-32622
CVE-2021-32622
Description
Matrix-React-SDK is a react-based SDK for inserting a Matrix chat/voip client into a web page. Before version 3.21.0, when uploading a file, the local file preview can lead to execution of scripts embedded in the uploaded file. This can only occur after several user interactions to open the preview in a separate tab. This only impacts the local user while in the process of uploading. It cannot be exploited remotely or by other users. This vulnerability is patched in version 3.21.0.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
matrix-react-sdknpm | < 3.21.0 | 3.21.0 |
Affected products
2- Range: < 3.21.0
Patches
Vulnerability mechanics
References
5- github.com/matrix-org/matrix-react-sdk/pull/5981nvdPatchThird Party AdvisoryWEB
- github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-8796-gc9j-63rvnvdPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-cg57-p69r-3m7pghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-32622ghsaADVISORY
- www.npmjs.com/package/matrix-react-sdkghsaWEB
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