MediumGHSA-mjxr-4v3x-q3m4CVE-2021-26540

Improper Input Validation in sanitize-html

Published 6 May 2021 · Updated 8 Nov 2023

Affected package

Affected: <2.3.2
Fixed in: 2.3.2

Update to the fixed version for your release line, for example:npm install sanitize-html@2.3.2

Details

Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the "allowedIframeHostnames" option when the "allowIframeRelativeUrls" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with "/\\example.com".

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.