References https://nvd.nist.gov/vuln/detail/CVE-2020-7799 https://github.com/advisories/GHSA-5649-2hc3-qv28 https://www.anquanke.com/post/id/198036 https://www.nsfocus.com.cn/html/2020/39_0129/849.html https://blog.nsfocus.net/cve-2020-7799-2/ https://threatprotect.qualys.com/2020/05/29/fusionauth-remote-code-execution-vulnerabilitycve-2020-7799/ https://nsfocusglobal.com/fusionauth-remote-code-execution-vulnerability-cve-2020-7799-threat-alert/ https://cloud.tencent.com/developer/article/1589302 https://wiki.96.mk/Web%E5%AE%89%E5%85%A8/Apache%20FusionAuth/%EF%BC%88CVE-2020-7799%EF%BC%89%20Apache%20FreeMarker%E6%A8%A1%E6%9D%BFFusionAuth%E8%BF%9C%E7%A8%8B%E4%BB%A3%E7%A0%81%E6%89%A7%E8%A1%8C%E6%BC%8F%E6%B4%9E/