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.

Affected Packages

npm matrix-react-sdk

Affected versions: 0 (fixed in 3.21.0)

Related CVEs

CVE-2021-32622

Key Information

GHSA ID

GHSA-cg57-p69r-3m7p

Published

February 10, 2022 11:46 PM

Last Modified

May 19, 2021 5:48 PM

CVSS Score

5.0 /10

Primary Ecosystem

npm

Primary Package

matrix-react-sdk

GitHub Reviewed

✓ Yes

Dataset

Last updated: November 25, 2025 6:29 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.