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

Quick assessment

Affected
matrix-org matrix-react-sdk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Travis Ralston matrix-react-sdk是 （Travis Ralston）开源的一个应用软件。用于将Matrix聊天/语音客户端插入网页。 Matrix-React-SDK 存在代码问题漏洞，该漏洞源于网络系统或产品的代码开发过程中存在设计或实现不当的问题。

CVSS 4.2 · Medium EPSS 0.37% · P30

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2021-32622

Vulnerability Information
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Vulnerability Title
File upload local preview can run embedded scripts after user interaction
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Travis Ralston matrix-react-sdk 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Travis Ralston matrix-react-sdk是 （Travis Ralston）开源的一个应用软件。用于将Matrix聊天/语音客户端插入网页。 Matrix-React-SDK 存在代码问题漏洞，该漏洞源于网络系统或产品的代码开发过程中存在设计或实现不当的问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
matrix-org matrix-react-sdk < 3.21.0 -

II. Public POCs for CVE-2021-32622

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III. Intelligence Information for CVE-2021-32622

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Patches & Fixes for CVE-2021-32622 (1)

Vendor Advisories for CVE-2021-32622 (1)

IV. Related Vulnerabilities

Same product: matrix-react-sdk
Same vendor: matrix-org
Same weakness: CWE-74

V. Comments for CVE-2021-32622

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