Cross-site Scripting (XSS) Affecting html-janitor package, versions <2.0.4


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.07% (32nd percentile)

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  • Snyk IDnpm:html-janitor:20180123
  • published11 Feb 2018
  • disclosed23 Jan 2018
  • creditMartin Bajanik

Introduced: 23 Jan 2018

CVE-2017-0928  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade html-janitor to version 2.0.4 or higher.

Overview

html-janitor is a library that cleans up your markup and allows you to take control of your HTML.

Affected versions of this package are vulnerable to Cross-site Scripting (XSS). Arbitrary HTML can pass the sanitization process, which can be unexpected and dangerous (XSS) in case user-controlled input is passed to the clean function.

PoC by Martin Bajanik

var myJanitor = new HTMLJanitor({tags:{p:{}}});
var cleanHtml = myJanitor.clean("<form><object onmouseover=alert(document.domain) name=_sanitized></object></form>")
console.log(cleanHtml) 
// logs: <form><object onmouseover=alert(document.domain) name=_sanitized></object></form>

CVSS Scores

version 3.1