CVE-2020-13485
The Knock Knock plugin before 1.2.8 for Craft CMS allows IP Whitelist bypass via an X-Forwarded-For HTTP header.
Date published : 2020-05-25
https://github.com/verbb/knock-knock/blob/craft-3/CHANGELOG.md
https://limpidsecurity.pl/security-advisories/1/knock-knock-plugin-for-craft-cms/