Improper Input Validation in sanitize-html

GHSA-rjqq-98f6-6j3r · CVE-2021-26539

Published May 6, 2021 · Modified Nov 8, 2023

Description

Apostrophe Technologies sanitize-html before 2.3.1 does not properly handle internationalized domain name (IDN) which could allow an attacker to bypass hostname whitelist validation set by the "allowedIframeHostnames" option.

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-26539
WEB https://github.com/apostrophecms/sanitize-html/pull/458
WEB https://github.com/apostrophecms/sanitize-html/commit/bdf7836ef8f0e5b21f9a1aab0623ae8fcd09c1da
WEB https://advisory.checkmarx.net/advisory/CX-2021-4308
PACKAGE https://github.com/apostrophecms/sanitize-html
WEB https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#231-2021-01-22

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