CVE-2021-23342 Information

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

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

6.1