CVE-2021-26539 Information

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 llowedIframeHostnames\ option.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3