CVE-2020-7773 Information

Description

This affects the package markdown-it-highlightjs before 3.3.1. It is possible insert malicious JavaScript as a value of lang in the markdown-it-highlightjs Inline code highlighting feature. const markdownItHighlightjs = require(\markdown-it-highlightjs); const md = require(‘markdown-it’); const reuslt_xss = md() .use(markdownItHighlightjs inline: true ) .render(‘console.log(42).>js’); console.log(reuslt_xss);

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-MARKDOWNITHIGHLIGHTJS-1040461 https://github.com/valeriangalliat/markdown-it-highlightjs/pull/14 https://github.com/valeriangalliat/markdown-it-highlightjs/blob/v3.3.0/index.js%23L52

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