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CVE-2021-21043— Reflected Cross-site Scripting (XSS) on version-compare and page-compare tools

Quick assessment

Affected
Adobe Experience Manager
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.

Adobe InDesign是美国奥多比（Adobe）公司的一套排版编辑应用程序。 Acrobat InDesign version 16.0 (and earlier) 存在跨站脚本漏洞，该漏洞源于没有正确处理无效的JCR字符，攻击者可利用该漏洞将恶意JavaScript内容注入到易受攻击的表单字段中，并在受害者的浏览器上下文中执行它。

CVSS 6.1 · Medium EPSS 3.34% · P88

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2021-21043

Vulnerability Information
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Vulnerability Title
Reflected Cross-site Scripting (XSS) on version-compare and page-compare tools
Source: CVE Program / CVE List V5
Vulnerability Description
ACS Commons version 4.9.2 (and earlier) suffers from a Reflected Cross-site Scripting (XSS) vulnerability in version-compare and page-compare due to invalid JCR characters that are not handled correctly. An attacker could potentially exploit this vulnerability to inject malicious JavaScript content into vulnerable form fields and execute it within the context of the victim's browser. Exploitation of this issue requires user interaction in order to be successful.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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
Adobe InDesign 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Adobe InDesign是美国奥多比（Adobe）公司的一套排版编辑应用程序。 Acrobat InDesign version 16.0 (and earlier) 存在跨站脚本漏洞，该漏洞源于没有正确处理无效的JCR字符，攻击者可利用该漏洞将恶意JavaScript内容注入到易受攻击的表单字段中，并在受害者的浏览器上下文中执行它。
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
Adobe Experience Manager unspecified ~ 4.9.2 -

II. Public POCs for CVE-2021-21043

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III. Intelligence Information for CVE-2021-21043

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Vendor Advisories for CVE-2021-21043 (1)

IV. Related Vulnerabilities

Same product: Experience Manager
Same vendor: Adobe
Same weakness: CWE-79

V. Comments for CVE-2021-21043

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