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CVE-2023-37259— Cross site scripting in Export Chat feature

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.

matrix-react-sdk是Matrix开源的一个用于将Matrix chat/voip客户端插入网页的组件。 matrix-react-sdk 3.32.0到3.76.0版本存在跨站脚本漏洞，该漏洞源于导出聊天功能在生成的文档中包含某些攻击者控制的元素，且没有进行充分的转义，从而导致 XSS。

CVSS 6.1 · Medium EPSS 0.45% · P37
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I. Basic Information for CVE-2023-37259

Vulnerability Information
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Vulnerability Title
Cross site scripting in Export Chat feature
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. The Export Chat feature includes certain attacker-controlled elements in the generated document without sufficient escaping, leading to stored Cross site scripting (XSS). Since the Export Chat feature generates a separate document, an attacker can only inject code run from the `null` origin, restricting the impact. However, the attacker can still potentially use the XSS to leak message contents. A malicious homeserver is a potential attacker since the affected inputs are controllable server-side. This issue has been addressed in commit `22fcd34c60` which is included in release version 3.76.0. Users are advised to upgrade. The only known workaround for this issue is to disable or to not use the Export Chat feature.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
matrix-react-sdk 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
matrix-react-sdk是Matrix开源的一个用于将Matrix chat/voip客户端插入网页的组件。 matrix-react-sdk 3.32.0到3.76.0版本存在跨站脚本漏洞，该漏洞源于导出聊天功能在生成的文档中包含某些攻击者控制的元素，且没有进行充分的转义，从而导致 XSS。
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 >= 3.32.0, < 3.76.0 -

II. Public POCs for CVE-2023-37259

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III. Intelligence Information for CVE-2023-37259

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Patches & Fixes for CVE-2023-37259 (1)

Vendor Advisories for CVE-2023-37259 (1)

IV. Related Vulnerabilities

Same product: matrix-react-sdk
Same vendor: matrix-org
Same weakness: CWE-79

V. Comments for CVE-2023-37259

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