CVE-2021-21320

User content sandbox can be confused into opening arbitrary documents

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

matrix-react-sdk is an npm package which is a Matrix SDK for React Javascript. In matrix-react-sdk before version 3.15.0, the user content sandbox can be abused to trick users into opening unexpected documents. The content is opened with a `blob` origin that cannot access Matrix user data, so messages and secrets are not at risk. This has been fixed in version 3.15.0.

matrix-react-sdk es un paquete npm que es un Matrix SDK para React Javascript. En matrix-react-sdk anterior a la versión 3.15.0, el sandbox del contenido del usuario puede ser abusado para engañar a los usuarios para que abran documentos inesperados. El contenido es abierto con un origen "blob" que no puede acceder a los datos del usuario de Matrix, por lo que los mensajes y secretos no están en riesgo. Esto ha sido corregido en la versión 3.15.0

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-22 CVE Reserved
2021-03-02 CVE Published
2023-11-15 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-345: Insufficient Verification of Data Authenticity

CAPEC

References (4)

URL	Tag	Source
https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-52mq-6jcv-j79x	Third Party Advisory
https://www.npmjs.com/package/matrix-react-sdk	Product

URL	Date	SRC

URL	Date	SRC
https://github.com/matrix-org/matrix-react-sdk/commit/b386f0c73b95ecbb6ea7f8f79c6ff5171a8dedd1	2021-03-08
https://github.com/matrix-org/matrix-react-sdk/pull/5657	2021-03-08

URL	Date	SRC

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"				< 3.15.0 Search vendor "Matrix-react-sdk Project" for product "Matrix-react-sdk" and version " < 3.15.0"		node.js		Affected