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CVE-2021-43841— XSS by SVG upload in xwiki-platform

Quick assessment

Affected
xwiki xwiki-platform
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.

Xwiki Platform是法国Xwiki公司的一套用于创建Web协作应用程序的Wiki平台。 Xwiki Platform 存在跨站脚本漏洞，使用默认 XWiki 配置时，攻击者可能会上传包含在对文件执行下载操作时执行的脚本的 SVG。

CVSS 5.4 · Medium EPSS 0.87% · P59
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I. Basic Information for CVE-2021-43841

Vulnerability Information
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Vulnerability Title
XSS by SVG upload in xwiki-platform
Source: CVE Program / CVE List V5
Vulnerability Description
XWiki is a generic wiki platform offering runtime services for applications built on top of it. When using default XWiki configuration, it's possible for an attacker to upload an SVG containing a script executed when executing the download action on the file. This problem has been patched so that the default configuration doesn't allow to display the SVG files in the browser. Users are advised to update or to disallow uploads of SVG files.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
Xwiki Platform 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xwiki Platform是法国Xwiki公司的一套用于创建Web协作应用程序的Wiki平台。 Xwiki Platform 存在跨站脚本漏洞，使用默认 XWiki 配置时，攻击者可能会上传包含在对文件执行下载操作时执行的脚本的 SVG。
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
xwiki xwiki-platform < 12.10.6 -

II. Public POCs for CVE-2021-43841

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III. Intelligence Information for CVE-2021-43841

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Patches & Fixes for CVE-2021-43841 (1)

Vendor Advisories for CVE-2021-43841 (1)

Other References for CVE-2021-43841 (2)

IV. Related Vulnerabilities

Same product: xwiki-platform
Same vendor: xwiki
Same weakness: CWE-79