VULNERABILITY INTELLIGENCE

CVE-2021-32622

CVSS score4.2 MEDIUM
EPSS probability0.37%
CISA KEVNot currently listed
Published2021-05-17
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

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.

Weakness classification

  • security-advisories@github.com: CWE-74
  • nvd@nist.gov: CWE-434

Primary references