Provide references for CVE-2021-3111.
Where can I find more information about CVE-2021-3111?
References are available at: https://documentation.concrete5.org/developers/introduction/version-history, https://github.com/Quadron-Research-Lab/CVE/blob/main/CVE-2021-3111.pdf, http://packetstormsecurity.com/files/161600/Concrete5-8.5.4-Cross-Site-Scripting.html, https://documentation.concrete5.org/developers/introduction/version-history/855-release-notes, http://packetstormsecurity.com/files/161997/Concrete5-8.5.4-Cross-Site-Scripting.html.