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CVE-2021-21383— XSS in Wiki.js

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 before version 2.5.191 存在跨站脚本漏洞，攻击者可利用该漏洞在其他用户查看页面时执行恶意JavaScript。

CVSS 7.6 · High EPSS 0.88% · P56

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2021-21383

Vulnerability Information
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Vulnerability Title
XSS in Wiki.js
Source: CVE Program / CVE List V5
Vulnerability Description
Wiki.js an open-source wiki app built on Node.js. Wiki.js before version 2.5.191 is vulnerable to stored cross-site scripting through mustache expressions in code blocks. This vulnerability exists due to mustache expressions being parsed by Vue during content injection even though it is contained within a `<pre>` element. By creating a crafted wiki page, a malicious Wiki.js user may stage a stored cross-site scripting attack. This allows the attacker to execute malicious JavaScript when the page is viewed by other users. For an example see referenced GitHub Security Advisory. Commit 5ffa189383dd716f12b56b8cae2ba0d075996cf1 fixes this vulnerability by adding the v-pre directive to all `<pre>` tags during the render.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/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 before version 2.5.191 存在跨站脚本漏洞，攻击者可利用该漏洞在其他用户查看页面时执行恶意JavaScript。
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
Requarks wiki < 2.5.191 -

II. Public POCs for CVE-2021-21383

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III. Intelligence Information for CVE-2021-21383

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Patches & Fixes for CVE-2021-21383 (1)

Vendor Advisories for CVE-2021-21383 (1)

Other References for CVE-2021-21383 (1)

IV. Related Vulnerabilities

Same product: wiki
Same vendor: Requarks
Same weakness: CWE-79

V. Comments for CVE-2021-21383

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