// For flags

CVE-2021-32622

File upload local preview can run embedded scripts after user interaction

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Matrix-React-SDK es un SDK basado en react para insertar un cliente de chat/voip de Matrix en una página web. Anterior a versión 3.21.0, al cargar un archivo, la vista previa del archivo local puede conllevar a una ejecución de scripts insertados en el archivo cargado. Esto solo puede ocurrir después de varias interacciones del usuario para abrir la vista previa en una pestaña separada. Esto solo afecta al usuario local durante el proceso de carga. No puede ser explotado remotamente o por otros usuarios. Esta vulnerabilidad está parcheada en la versión 3.21.0

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Local
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-05-12 CVE Reserved
  • 2021-05-17 CVE Published
  • 2024-01-31 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
  • CWE-434: Unrestricted Upload of File with Dangerous Type
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Matrix-react-sdk Project
Search vendor "Matrix-react-sdk Project"
 Matrix-react-sdk
Search vendor "Matrix-react-sdk Project" for product "Matrix-react-sdk"
 < 3.21.0
Search vendor "Matrix-react-sdk Project" for product "Matrix-react-sdk" and version " < 3.21.0"
node.js
Affected