File upload local preview can run embedded scripts after user interaction
CVE-2021-32622

4.2MEDIUM

Key Information:

Vendor

Matrix-org

Status
Matrix-react-sdk
Vendor
CVE Published:
17 May 2021

What is CVE-2021-32622?

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 Version(s)

matrix-react-sdk < 3.21.0

References

https://github.com/matrix-org/matrix-react-sdk/security/a...
x_refsource_CONFIRM
https://github.com/matrix-org/matrix-react-sdk/pull/5981
x_refsource_MISC

CVSS V3.1

Score:
4.2
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.