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Cross-site Scripting (XSS) Affecting moemark package, versions *

Severity

 Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    Exploit Maturity
    Mature

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  • Snyk ID SNYK-JS-MOEMARK-1083284
  • published 9 Mar 2021
  • disclosed 10 Dec 2017
  • credit silviavali
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Introduced: 10 Dec 2017

CVE NOT AVAILABLE CWE-79 Open this link in a new tab

How to fix?

There is no fixed version for moemark.

Overview

moemark is a Moeditor's markdown parser, forked from marked.

Affected versions of this package are vulnerable to Cross-site Scripting (XSS). Malicious JavaScript can be inserted as part of a .md file. This can be leveraged to execute arbitrary commands on a victim's system due to nodeIntegration being enabled on moeditor. This issue exists due to no sanitization in momark.

PoC

<onmouseover="alert(1)"> <s onmouseover="var os = require('os'); var hostname = os.platform(); var homedir = os.homedir(); alert('Host:' + hostname + 'directory: ' + homedir);">Hallo</s>

CVSS Scores

version 3.1
Expand this section

Snyk

7.6 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    Low