Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWYyNDYteHJyai1nOGo2

Cross-site Scripting in markdown-it-highlightjs

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);

Permalink: https://github.com/advisories/GHSA-f246-xrrj-g8j6
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWYyNDYteHJyai1nOGo2
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 2 years ago
Updated: 8 months ago

CVSS Score: 6.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Identifiers: GHSA-f246-xrrj-g8j6, CVE-2020-7773
References:

• https://nvd.nist.gov/vuln/detail/CVE-2020-7773
• https://github.com/valeriangalliat/markdown-it-highlightjs/pull/14
• https://github.com/valeriangalliat/markdown-it-highlightjs/blob/v3.3.0/index.js%23L52
• https://snyk.io/vuln/SNYK-JS-MARKDOWNITHIGHLIGHTJS-1040461
• https://github.com/advisories/GHSA-f246-xrrj-g8j6

Repository: https://github.com/valeriangalliat/markdown-it-highlightjs
Blast Radius: 20.0

Affected Packages