CVE-2020-7773

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);

• CWE-79

• https://github.com/valeriangalliat/markdown-it-highlightjs/blob/v3.3.0/index.js%23L52Broken Link
• https://github.com/valeriangalliat/markdown-it-highlightjs/pull/14Exploit, Third Party Advisory
• https://snyk.io/vuln/SNYK-JS-MARKDOWNITHIGHLIGHTJS-1040461Mitigation, Third Party Advisory
• https://github.com/valeriangalliat/markdown-it-highlightjs/blob/v3.3.0/index.js%23L52Broken Link
• https://github.com/valeriangalliat/markdown-it-highlightjs/pull/14Exploit, Third Party Advisory
• https://snyk.io/vuln/SNYK-JS-MARKDOWNITHIGHLIGHTJS-1040461Mitigation, Third Party Advisory

Published

Nov 16, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2020-7767All versions of package express-validators are vulnerable to…5.3
• CVE-2020-7768The package grpc before 1.24.4; the package @grpc/grpc-js be…9.8
• CVE-2020-7769This affects the package nodemailer before 6.4.16. Use of cr…9.8
• CVE-2020-7770This affects the package json8 before 1.0.3. The function ad…9.8
• CVE-2020-7771The package asciitable.js before 1.0.3 are vulnerable to Pro…9.8
• CVE-2020-7772This affects the package doc-path before 2.1.2.9.8
• CVE-2020-7774The package y18n before 3.2.2, 4.0.1 and 5.0.5, is vulnerabl…9.8
• CVE-2020-7775This affects all versions of package freediskspace. The vuln…9.8
• CVE-2020-7776This affects the package phpoffice/phpspreadsheet from 0.0.0…6.4
• CVE-2020-7777This affects all versions of package jsen. If an attacker ca…7.2
• CVE-2020-7778This affects the package systeminformation before 4.30.2. Th…7.3
• CVE-2020-7779All versions of package djvalidator are vulnerable to Regula…7.5