CVE-2021-26540: Origin Validation Error

February 8, 2021 (updated April 1, 2021)

sanitize-html does not properly validate the hostnames set by the allowedIframeHostnames option when the allowIframeRelativeUrls is set to true, which allows attackers to bypass the hostname allow list for an iframe element.

References

nvd.nist.gov/vuln/detail/CVE-2021-26540

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