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Access Restriction Bypass Affecting sanitize-html package, versions <2.3.1

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.14% (49th percentile)
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NVD
5.3 medium
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Red Hat
5.3 medium

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  • Snyk ID SNYK-JS-SANITIZEHTML-1070786
  • published 9 Feb 2021
  • disclosed 9 Feb 2021
  • credit Ron Masas, Checkmarx
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Introduced: 9 Feb 2021

CVE-2021-26539 Open this link in a new tab
CWE-20 Open this link in a new tab

How to fix?

Upgrade sanitize-html to version 2.3.1 or higher.

Overview

sanitize-html is a library that allows you to clean up user-submitted HTML, preserving whitelisted elements and whitelisted attributes on a per-element basis

Affected versions of this package are vulnerable to Access Restriction Bypass. Internationalized domain name (IDN) is not properly handled. This allows attackers to bypass hostname whitelist validation set by the allowedIframeHostnames option.

References