CVE-2021-32622CWE-74

File upload local preview can run embedded scripts after user interaction

Medium · published May 17, 2021

CVSS v3.1
4.2
EPSS
0%
Percentile
30.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.2 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00373 · 30.1th percentile
Weakness
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2021-05-17T19:35Z
EPSS history
Timeline
  • 17 MAY 19:35Z
    File upload local preview can run embedded scripts after user interaction
    cvelistv5