CVE-2021-23342— Cross-site Scripting (XSS)
Quick assessment
Affected
n/a docsify
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.
docsify是一款文档网站生成器。 Docsify 中存在跨站脚本漏洞。该漏洞源于可以通过插入更多“///”字符绕过isURL外部检查、从远程url解析HTML时，对主页上的HTML代码进行清理，但这种清理不会在侧边栏中进行。攻击者可通过该漏洞执行Javascript代码。以下产品及版本受到影响：docsify 4.12.0 之前版本。
Possible ATT&CK Techniques 1 AI
T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2021-23342
Vulnerability Information
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Vulnerability Title
Cross-site Scripting (XSS)
Source: CVE Program / CVE List V5
Vulnerability Description
This affects the package docsify before 4.12.0. It is possible to bypass the remediation done by CVE-2020-7680 and execute malicious JavaScript through the following methods 1) When parsing HTML from remote URLs, the HTML code on the main page is sanitized, but this sanitization is not taking place in the sidebar. 2) The isURL external check can be bypassed by inserting more “////” characters
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
docsify 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
docsify是一款文档网站生成器。 Docsify 中存在跨站脚本漏洞。该漏洞源于可以通过插入更多“///”字符绕过isURL外部检查、从远程url解析HTML时，对主页上的HTML代码进行清理，但这种清理不会在侧边栏中进行。攻击者可通过该漏洞执行Javascript代码。以下产品及版本受到影响：docsify 4.12.0 之前版本。
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 |
|---|---|---|---|---|
| - | docsify | unspecified ~ 4.12.0 | - |
|
II. Public POCs for CVE-2021-23342
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2021-23342 (1)
Vendor Advisories for CVE-2021-23342 (1)
-
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1076593 x_refsource_MISC
Exploits & Public PoCs for CVE-2021-23342 (1)
Mailing List Discussions for CVE-2021-23342 (1)
Same Patch Batch · n/a · 2021-02-19 · 38 CVEs total
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Showing top 20 of 38 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: docsify
V. Comments for CVE-2021-23342
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