CVE-2021-32622

Name: CVE-2021-32622
Creator: NVD / NIST
Published: 2021-05-17T20:15:07.527+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2021-32622 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

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 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.37%

29.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Matrix-React-Sdk Project	Matrix-React-Sdk	< 3.21.0

References

https://github.com/matrix-org/matrix-react-sdk/pull/5981Patch, Third Party Advisory
https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-8796-gc9j-63rvPatch, Third Party Advisory
https://github.com/matrix-org/matrix-react-sdk/pull/5981Patch, Third Party Advisory
https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-8796-gc9j-63rvPatch, Third Party Advisory

Timeline

Published: May 17, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32622?

How severe is CVE-2021-32622?

CVE-2021-32622 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32622?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-32622?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST