CVE-2021-23342

Public Exploit
Cross-site Scripting (XSS)

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

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.46%
Third-Party Advisory packetstormsecurity.com Third-Party Advisory seclists.org Third-Party Advisory github.com Third-Party Advisory snyk.io Third-Party Advisory snyk.io
Affected: n/a docsify
Published at:
Updated at:

References

Link Tags
https://snyk.io/vuln/SNYK-JS-DOCSIFY-1066017 third party advisory exploit
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1076593 third party advisory exploit
https://github.com/docsifyjs/docsify/commit/ff2a66f12752471277fe81a64ad6c4b2c08111fe third party advisory patch
http://seclists.org/fulldisclosure/2021/Feb/71 third party advisory mailing list
http://packetstormsecurity.com/files/161495/docsify-4.11.6-Cross-Site-Scripting.html third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-23342?
CVE-2021-23342 has been scored as a high severity vulnerability.
How to fix CVE-2021-23342?
To fix CVE-2021-23342, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23342 being actively exploited in the wild?
It is possible that CVE-2021-23342 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23342?
CVE-2021-23342 affects n/a docsify.
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