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docsify 4.11.6 Cross Site Scripting

docsify 4.11.6 Cross Site Scripting
Posted Feb 22, 2021
Authored by EgiX

docsify versions 4.11.6 and below suffer from a cross site scripting vulnerability. This vulnerability exists due to an incomplete fix for CVE-2020-7680.

tags | advisory, xss
advisories | CVE-2020-7680, CVE-2021-23342
MD5 | 4f1f48238c4e1aa6fdf3106d9952a98f

docsify 4.11.6 Cross Site Scripting

Change Mirror Download
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docsify <= 4.11.6 DOM-based Cross-Site Scripting Vulnerability
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[-] Software Link:

https://docsify.js.org/


[-] Affected Versions:

Version 4.11.6 and prior versions.


[-] Vulnerability Description:

The vulnerability exists due to an incomplete fix for CVE-2020-7680.
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.
This can be exploited to inject arbitrary HTML code and carry out
DOM-based Cross-Site Scripting (XSS) attacks.


[-] Solution:

Upgrade to version 4.12.0 or later.


[-] Disclosure Timeline:

[23/12/2020] - Vendor notified, no response
[13/01/2021] - Opened issue on GitHub:
https://github.com/docsifyjs/docsify/issues/1477
[13/01/2021] - Vulnerability details sent to Snyk
[08/02/2021] - Version 4.12.0 released
[18/02/2021] - Public disclosure


[-] CVE Reference:

The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CVE-2021-23342 to this vulnerability.


[-] Other References:

https://snyk.io/vuln/SNYK-JS-DOCSIFY-1066017


[-] Original Advisory:

http://karmainsecurity.com/KIS-2021-02

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