// For flags

CVE-2020-7773

Cross-site Scripting (XSS)

Severity Score

6.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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);

Esto afecta al paquete markdown-it-highlightjs versiones anteriores a 3.3.1. Es posible insertar JavaScript malicioso como valor de lang en la funcionalidad de resaltado de código en línea markdown-it-highlightjs. 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)

*Credits: ooooooo_q
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-01-21 CVE Reserved
  • 2020-11-16 CVE Published
  • 2023-08-02 EPSS Updated
  • 2024-09-16 CVE Updated
  • 2024-09-16 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Markdown-it-highlightjs Project
Search vendor "Markdown-it-highlightjs Project"
 Markdown-it-highlightjs
Search vendor "Markdown-it-highlightjs Project" for product "Markdown-it-highlightjs"
 < 3.3.1
Search vendor "Markdown-it-highlightjs Project" for product "Markdown-it-highlightjs" and version " < 3.3.1"
node.js
Affected