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CVE-2021-32622 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:4.2 MEDIUMVector:CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/matrix-org/matrix-react-sdk/pull/5981	CVE	PatchThird Party Advisory
https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-8796-gc9j-63rv	CVE	PatchThird Party Advisory
https://github.com/matrix-org/matrix-react-sdk/pull/5981	[email protected]	PatchThird Party Advisory
https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-8796-gc9j-63rv	[email protected]	PatchThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-434	Unrestricted Upload of File with Dangerous Type	[email protected]
CWE-74	Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')	[email protected]

Affected Products

Product	Versions
matrix-react-sdk project matrix-react-sdk	< 3.21.0
CPE cpe:2.3:a:matrix-react-sdk_project:matrix-react-sdk::::::node.js::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
May 25, 2021	Initial Analysis	[email protected]