CVE-2021-32622

File upload local preview can run embedded scripts after user interaction

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.

Categories

4.2
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.17%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: matrix-org matrix-react-sdk
Published at:
Updated at:

References

Link Tags
https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-8796-gc9j-63rv third party advisory patch
https://github.com/matrix-org/matrix-react-sdk/pull/5981 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-32622?
CVE-2021-32622 has been scored as a medium severity vulnerability.
How to fix CVE-2021-32622?
To fix CVE-2021-32622, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-32622 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-32622 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32622?
CVE-2021-32622 affects matrix-org matrix-react-sdk.
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