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.Referenceshttps://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#231-2021-01-22https://github.com/apostrophecms/sanitize-html/pull/458https://advisory.checkmarx.net/advisory/CX-2021-4308
