CVE-2021-25993— Requarks wiki.js - Stored Cross-Site Scripting (XSS) in markdown editor
Quick assessment
Affected
Requarks wiki
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.
Wiki.js是Requarks.io团队的一套基于Node.js并使用JavaScript语言编写的开源Wiki软件。 Wiki.js 2.0.0 beta.147 到 2.5.255版本存在跨站脚本漏洞，该漏洞源于软件中wiki.js缺少对于用户参数的有效过滤和转义，低权限用户在上传页面资产时可以上传包含恶意JavaScript的SVG文件。这将向服务器发送JWT令牌，并在受害者访问时导致帐户接管。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1550 · Use Alternate Authentication Material
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I. Basic Information for CVE-2021-25993
Vulnerability Information
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Vulnerability Title
Requarks wiki.js - Stored Cross-Site Scripting (XSS) in markdown editor
Source: CVE Program / CVE List V5
Vulnerability Description
In Requarks wiki.js, versions 2.0.0-beta.147 to 2.5.255 are affected by Stored XSS vulnerability, where a low privileged (editor) user can upload a SVG file that contains malicious JavaScript while uploading assets in the page. That will send the JWT tokens to the attacker’s server and will lead to account takeover when accessed by the victim.
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
Wiki.js 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wiki.js是Requarks.io团队的一套基于Node.js并使用JavaScript语言编写的开源Wiki软件。 Wiki.js 2.0.0 beta.147 到 2.5.255版本存在跨站脚本漏洞，该漏洞源于软件中wiki.js缺少对于用户参数的有效过滤和转义，低权限用户在上传页面资产时可以上传包含恶意JavaScript的SVG文件。这将向服务器发送JWT令牌，并在受害者访问时导致帐户接管。
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
II. Public POCs for CVE-2021-25993
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Patches & Fixes for CVE-2021-25993 (1)
Other References for CVE-2021-25993 (1)
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V. Comments for CVE-2021-25993
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